Author's Note: A remote cabin in the woods appeared to be the ideal place to study for her exams. She should have known better.

Thanks a lot to all who helped by providing feedback and corrections!


Part 1

Lin left the cabin and started her morning run through the forest. She liked to begin the day with rigorous physical activity to compensate for the hours she would later spend glued to her desk, studying for her exams.

Her running shoes beat a steady rhythm on the dry forest floor and for a moment she wondered about this observation, given that last night lightning and thunder had briefly disturbed her sleep, but apparently the storm had passed without bringing any rain. While her body automatically followed the familiar trail she let her mind dwell on the lessons she planned to cover today. Neurobiology was not her strong suit, hence she had to apply herself especially hard on the subject, but if she made good progress during the day, in the evening she would treat herself to some self-bondage play with her handcuffs. Although her parent's cabin lacked internet access, its remote location did not leave it entirely without interesting possibilities to entertain herself.

Lost in pleasurable thoughts she only noticed the strange puddle at the last moment and was barely able to stop before stepping into it. In front of her, filling a shallow depression in the track, a strange metallic liquid gleamed in the early morning's light. It looked a lot like a pool of quicksilver, except its silvery bright surface glittered with an otherworldly, iridescent sheen.

"Beautiful," Lin thought to herself and crouched down, moving to touch it, but at the last moment snatched her hand back. What was she thinking? Whatever the substance was, it certainly did not belong on the forest floor in front of her. She wondered if it was indeed quicksilver or some other toxic waste that somebody had dumped here instead of paying for its professional disposal. Alternatively, considering last night's flashes and booming sounds, maybe it was a spill left behind by a crashed plane or satellite? Yet, a quick look around confirmed that no smoldering wreckage was in evidence anywhere nearby. The mighty trees around her appeared as serene and undisturbed as ever.

Picking up a fallen twig, she gingerly probed the puddle's shiny surface. To her surprise, the liquid turned out to be rather viscous, offering stiff resistance to the stick's prodding and indeed, when she pulled her hand back, a layer of the stuff clung to the stick, stretching back to the pool's surface as if unwilling to release its quarry. Lin watched dumbstruck when more of the substance seemed to gather around the twig, strengthening the pull that tried to suck it back.

With a startled cry she let go of her probe and fell backwards onto her bottom. The strange substance had moved of its own volition, like a living being! Instantly, she was reminded of an old action flick featuring a shapeshifting, liquid metal killer robot sent into the past to dispatch some annoying youth who happened to be mankind's future savior. Lin considered it highly unlikely for this role to be her own destiny, yet caution suggested she should better quit playing researcher and and get into reverse gear posthaste.

In panic she scrambled back on her butt, but when her desperately kicking legs grazed the pool's edge, a thick tendril shot from the liquid and wrapped itself around her ankle. Immediately, her other foot was grabbed as well, rooting her in place. She violently attempted to pull up her legs, hoping to break the metal's hold, but only succeeded in sliding her torso closer to the pool. An irresistible force drew her legs together while more and more of the strange material flowed towards her and joined the strands already encircling her legs.

The fact that she had been endowed with a long-legged model's physique that many of her fellow students lusted after granted her only a few milliseconds reprieve while yet more tendrils spiraled around her legs, rapidly approaching her hips. Lin reared up and screamed at the top of her lungs, thrashing wildly to escape the cool metallic strands that had mated her legs into a single column of tightly compressed flesh. She had to break free! Instead, the inexorably advancing appendages reached her belly and quickly thickened into a broad cinch around her waist.

"Ahrg!" Her screams were cut off when the belt abruptly constricted around her middle and took away her breath. Lin felt as if she had been cut in half! Thankfully, the murderous compression relented momentarily, but not before her weakly flailing arms had been captured as well, then became welded to her sides. Immediately, at the front, the liquid metal slithered under her top and up between her breasts as well as in the back along her spine to form a wide collar around her neck. Lin ceased her futile struggles and became perfectly still. If the collar contracted like the belt had, it would surely crush her windpipe and strangle her. To her immense relief, the collar tightened only a little until it exerted a noticeable, but tolerable pressure. Nevertheless, she did not fail to miss the implied threat.

More and more of the metal encircled her body, wrapping her into an inescapable mesh of interlocking strands so that within seconds, the web extended from the soles of her shoes to the crown of her head. At first, its strands had been quite flexible, but as soon as they had ensured her captivity, they hardened and turned the web into a rigid shell: Her arms were pressed to her sides, her legs formed a single column and her skull was ensnared by a framework of metallic straps that left only her face free and kept her head totally immobilized. Although Lin strained against its tight embrace with all her strength, she failed to move her limbs even a single millimeter. The metal was far from done with her, however.

Lin gasped when she felt questing metal appendages slither into her underwear and enter her lower orifices. A rapidly expanding phallus formed in her pussy, filling her to capacity. At the same time, another wormed its way up into her urethra and extended into her bladder. The unwonted pressure was as discomfiting it was uncomfortable. Her anus was not spared the indignity of being violated in the aggravatingly familiar manner as well and once within her bowel, the intruder first swelled to painful dimensions, before relenting and becoming slightly smaller again. She felt like a goose stuffed for an upcoming feast and moaned disconsolately.

Perhaps the metal took issue with her noises, or maybe her mouth was simply the next point on its agenda; either way, Lin felt with trepidation how twin fingers of the stuff crept along her cheeks and insinuated themselves between her tightly compressed lips, then into her mouth. Quickly, as more metal flowed inside, a slightly flexible lump swelled between and behind her teeth, trapping her tongue and spreading her jaws apart, but it did not stop there! Suddenly, an appendage plunged down her throat deeply into her stomach, while yet another branched out into her airways. For endless seconds, Lin could neither breathe nor swallow, and with a sinking feeling she thought that surely the metal had moved in for the kill; but then, the blockage was gone and she gasped, greedily sucking in air in the shallow breaths allowed by her constricted chest.

Still trying to recover from this latest ordeal, she was assaulted by the oddest sensation yet, when a strange tingling began to suffuse her entire body. Unbeknownst to Lin, microscopic filaments of the liquid metal spread through all of her flesh, seemingly intent on attaching themselves to every cell. Actually, it was primarily her nerve cells that were targeted, hence the highest concentration of the fibers found their way into her brain. Although Lin was not aware of the fact that she had been compromised on the deepest level, for sure she noticed the effects: It felt like her frenzied thoughts had developed a faint echo; almost as if they were projected beyond her own head's acoustically dead confines into some wider space.

For the next several minutes nothing further happened. The respite gave Lin the opportunity to calm down a little and impose a modicum of order on her panicked mind. So far, the strange liquid metal had not harmed her, so probably it was not some killer robot sent into the past to terminate her. Instead, it seemed content to have immobilized and silenced her, but for what purpose? She was quite confident that humans were not part of the metal creature's diet, so maybe it was an alien just looking for a native symbiont it somehow depended on for its own survival? If she was very lucky, the alien would turn its host (i. e. herself!) into a dashing heroine with some really cool superpowers ...

With an effort, Lin reigned in her burgeoning fantasy before it could go completely off the rails. She examined her state of mind and noticed with astonishment that her previously predominant fear had been relegated to the background. It seemed as if the alien had flipped a switch to turn off her fight-or-flight reflex. Calming her down was probably a prerequisite before commencing the next phase of its nefarious plan: Lin experienced a bewildering barrage of sensations when the alien began to probe her body and mind and gauge her reaction to various stimuli.

Parts of her became alternately hot and cold; sounds of all frequencies flooded into her ears; bright, colorful flashes where projected into her eyes while a variety of sweet, sour, salty and bitter flavors assaulted her taste buds. At first, all of her senses were flooded indiscriminately, but soon a pattern emerged. Predictably, the liquid metal ceased its full spectrum onslaught and began to concentrate its efforts on the area between her legs.

The intruder buried so deeply in her pussy soon exhibited an amazing range of movement and rapidly employed it with a level of skill easily surpassing any lover she ever had ... and there had been quite a few. Given her model-level good looks she had never found it difficult to attract men or women (whom she actually found more congenial) to her bed; yet she was not ready to settle into a serious relationship until she had achieved her professional ambitions. Besides, she had never felt safe enough to reveal her rather peculiar sexual needs to anyone, which incidentally would have been a prerequisite for a fulfilling, long-term relationship. Hence, she had always preferred to assuage her masochistic fantasies of bondage and slavery with occasional sessions of self-bondage.

Now however, since the alien metal had tapped directly into her mind, a perfect feedback loop had been established and every bit of stimulation it provided was perfectly attuned to her needs. As a consequence, the twin phalluses within her loins not only moved, rotated and vibrated, but in addition administered electric shocks of varying intensity, these ranging from mildly aggravating to acutely painful, to her pussy and bowels.

With her fear artificially suppressed, she had no chance but to succumb to these insidious ministrations, especially since the entire scenario could easily have been taken from one of her own erotic fantasies: Inescapably bound and gagged, she was helpless to resist the skillful advances of a demonic lover with supernatural prowess. In record time, her arousal skyrocketed to unprecedented heights, both propelled along and held in check by the carefully timed electrical shocks that did not allow her to climax prematurely.

Learning at a prodigious rate, the sentient metal constantly introduced new elements to the mix, thoroughly compiling an all-encompassing map of Lin's erogenous zones. Soon she found her tender, blood-engorged nipples being sucked and pinched and her firm breasts roughly manipulated, while unseen teeth nibbled at her earlobes. Her clit received special attention, a delicate appendage delivered bursts of tingling electricity interspersed with feather-light touches that caused her to unabashedly scream her unendurable lust into the gag plugging her mouth.

After an interminable stretch of time, it simply became too much. Her mind blanked and her insides seemed to melt when the continued assault finally drove her over the edge. The long-delayed climax lit up every cell in her body like the EMP from an exploding atomic bomb. Lost in the throes of an incredibly intense sexual release, she wildly thrashed against her bondage until blissful oblivion engulfed her at last.

When she regained her senses, for long minutes she lay stunned. Never before in her life had she experienced sensations of such wondrous intensity and she immediately craved to repeat the experience with an almost desperate poignancy that frightened her. Like an addict, she knew she would do almost anything for that wish to be granted, although it would probably inure her to any lesser pleasures forever and thereby turn her into the metal creature's abject slave. She wondered if that had been the plan all along and if her sensations had been artificially amplified somehow to produce this outcome. Yet suspecting she was being manipulated did not help at all: The conditioning worked nevertheless.

For the time being however, her captor was content to observe and learn. Within her mind, it had discovered a promising link between pleasure and pain that merited further exploration and fortunately, it did not need to be shy about it. Through direct stimulation of the subject's nerves it could simulate the most severe tortures without causing actual injuries.

A sharp pain in Lin's left breast destroyed the last vestiges of her orgasm's afterglow. It felt as if her flesh was being skewered by a white-hot needle. Instinctively, she struggled to assume a protective fetal position and raise her hands towards her chest, but try as she might, the metal did not permit her to budge a millimeter. Then the pain was suddenly gone, only to assault her other breast after a few seconds of blissful respite. She snapped her eyes shut and howled mindlessly into her gag.

For the next minutes, she was mercilessly tortured. All her body, but especially the parts that had been instrumental in giving her so much pleasure, were now subjected to the same almost intolerable agony. It seemed to her that any torment ever invented (and creativity abounded in this field) was visited upon her. Everything hurt like hell! Every single nerve poured white hot pain into her feverish brain! The metal granted her only short respites lest her mind shut down and she could escape into unconsciousness. During those lucid moments, Lin was terribly scared that she would be left permanently damaged in body and mind by the ordeal, provided that by some miracle she even happened to survive it. Obviously, she was allowed to experience fear again and she put her regained ability to good use.

She was at the end of her mental and physical endurance when, all of a sudden, everything changed. Out of nowhere, the image of an imposing figure loomed in her mind, a radiant goddess too beautiful and terrible to behold by a mere mortal like herself. At the same time, the conviction grew in Lin that her torture was not simply an act of random cruelty, but was in fact a test; a way to prove herself worthy of the goddess' regard. The chance to make an offering of her suffering was a privilege that could not be refused and instinctively Lin began to deal with the excruciating pain in the only way left open to her: reframing her torment as an act of submission, her brain was suddenly able to derive pleasure from it. One moment she was at the brink of total collapse, then in the next instant her latent masochism became ascendant and transformed her suffering into an irrepressible erotic experience.

In short order, her muffled screams turned into throaty moans when pain turned into pleasure and both became indistinguishable. Buried under an avalanche of raw sensation too acute to process or endure, her overwhelmed mind succumbed to another earth-shattering orgasm.

This time, Lin took even longer to recover. She remained in a near catatonic state for nearly an hour while her sweat drenched body dried in the day's mounting heat. The sun had risen high enough to shine down through the dense leafy canopy and reflect in multicolored highlights off the iridescent prison that continued to hold her in its unyielding embrace. Far from idle itself, the alien metal was busy analyzing the data it had collected.

Interestingly, not all pain was created the same. Most pain was only that, yet, depending on its nature and the subject's state of mind, some could be transformed into sexual pleasure. The first kind trivially lent itself to punishment, while the second fit right into the tool set for the much more effective reinforcement training. Its captive had proven to be highly susceptible to suggestions of submission and promised to thrive in captivity. Even her current state of enforced immobilization met with the subject's subconscious approval and in fact, she secretly yearned for more stringent bondage. The social conditioning responsible for her conflicted feelings towards her repressed fantasies of slavery and submission would be easily overcome, once she had accepted her new circumstances.

The overall assessment yielded an extremely high score: young, in excellent health and with an apparently limitless libido and capacity to enjoy sexual pleasure, the female would be a most suitable specimen for collecting. The sentient metal sent its report and immediately received authorization to proceed with the final phase of the collection process.


Part 2 (added: 2020/04/13)

It had long been established that for the set of personality traits the captive presented, the best results would be achieved if she was allowed to exercise some choice regarding her enslavement, albeit limited to alternatives that coincided with the objective of preparing her for her new station in life. Thus, her own choices and deepest desires established a baseline for her future role, ensuring that she would eventually realize her full potential. Without further ado, the metal implemented the measures that would put the subject into the appropriate state of mind.

'Oh no, what now?' Lin was shaken from her stupor when a thick strand of the metal shot upwards and wrapped itself around a stout branch that arched over the trail. Once securely anchored, the strand contracted and Lin was hoisted feet first up into the air, until she found herself dangling upside-down about a meter above the ground. It was an awkward position to have to endure, yet due to her excellent circulation (and probably the metal's meddling) she felt no ill effects at all. Hence, she suffered it uncomplainingly and only started to groan when the insidious assault on her erogenous zones resumed, this time mixing pleasurable and painful stimulation in equal measure.

The preceding orgasms had left her satiated, drained and exhausted, hence she did not believe she would be up for another round, yet to her surprise, she soon found herself becoming wet again. Her body had already been conditioned to respond indiscriminately to the metal's manipulation with arousal, regardless of whether her mind tried to tell it otherwise. Besides, her earlier mortal fear had given way to the titillating thrill of the unknown: The prospect of having to submit to a formidable, alien Mistress excited her like nothing before in her life and if her adventure up to now hinted at what her future with Mistress would be like she wanted to sample its pleasures with an absoluteness that left no room for doubt. And she wanted so much more of it! However, the metal had changed tactics once again, as she soon realized to her chagrin.

Instead of continuously ramping up the intensity of its harsh fondling, the metal kept her lust simmering on a level too acute to endure, but backed off the moment an orgasm approached. Every time this happened, Lin howled with frustrated need into her gag. With each new round of this awful game the unbearable tension was ratcheted up another notch, until she felt she must surely burst.

Once more the vicious cycle started, her pussy, breasts and every other erogenous zone she possessed was exposed to a continuously stepped-up whirlwind of sensations, varying between tender caresses and nasty shocks, yet each perfectly attuned to whatever desire her brain telegraphed to her wily tormentor. In record time, Lin was once again shuddering with pleasure in her restraints. She was a hair's breadths away from exploding into a spectacular orgasm when every stimulation suddenly ceased and she was left high and dry for the umpteenth time.

'No, no, not again!' She had been so damned close! It was grossly unfair to be denied again and again. In a fit of temper Lin bucked and strained with all her strength against the bonds that held her arms uselessly at her sides, desperately attempting to somehow reach her crotch. If bone and sinew had been up to the task, she would surely have ripped the strands of metal apart, but so all she achieved was a totally ineffectual rocking movement that mocked her titanic effort. Beside herself with rage, she screeched at the top of her lungs, yet even her scream was effortlessly muffled by the lump in her mouth, leaving Lin at her wit's end, frantic with unfulfilled lust. Then it got even worse.

The metal had learned an impressive new trick and the next time she was at the brink of what promised to be the greatest orgasm of her life, it held her there, twitching and moaning, but unable to find the release she desperately craved. She absolutely needed to climax, yet could not! When, after interminable minutes, the metal finally released its hold of her mind and allowed her raging libido to subside a little, Lin was a sobbing wreck. She would do whatever it took to be granted her climax! Whatever was required of her, she would gladly agree if only it ended this erotic torment. Suddenly, she knew this thought was, in fact, the key to her salvation.

Her Goddess had graciously accepted the gift she had made of her lust and pain. Now it was up to her to demonstrate her unconditional surrender to the Mistress' dominance. Now she had to turn herself into the slave she had dreamed of becoming for so long, so that she might be rewarded with the boon she craved. The Goddess' metal minion had been tasked to put its considerable means at her disposal to help with her transformation.

In Lin's mind formed a surprisingly detailed image of how she currently looked: Dangling upside-down from a tree, flushed and panting from exertion, her blonde hair matted and disheveled, her running outfit stained and soaked with sweat. Her bondage was more cumbersome than tantalizing and apart from her upside-down configuration far less challenging than the positions she regularly attempted on her own. In addition, it gave her the aspect of a sausage caught in netting, like a salami hanging in the pantry - this would not do. Like, not at all! So in her mind's eye she began to make changes and the metal dutifully implemented them in reality.

First she decided that a proper slave needed to be naked. The metal made short work of her clothes and shoes, forming blades that shredded them to small pieces that rained down on the forest floor below. She critically surveyed her now exposed body. Normally, she shaved regularly, but since she was staying alone in a remote place, she had foregone the routine for the past week and some stubble had accumulated at her crotch, legs and arm pits. Somehow she knew that the metal could take care of that, once and for all. Before she had even consciously formulated the thought, an army of silvery blobs crawled all over her, excising all body hair below her neck and also completely eradicating the follicles at the same time. Still brimming with pleasure, Lin did not mind the discomfort that accompanied her permanent depilation. Besides, the entire process took only a few minutes and when done, her skin appeared smoother than it had been since she was a baby.

Encouraged by this success, she proceeded without pause to have other flaws corrected that conflicted with her idea of a perfect body. Before long, her few moles, an in hindsight rather embarrassing tattoo on her ankle and the scar on the back of her hand that attested to a conflict of opinion with the late family cat were gone forever. Unfortunately, nothing could be done about her boring blue eyes; while such changes were possible in principle, they required gene editing beyond what the metal could accomplish on short notice. On the other hand, it excelled in modifications of a more surgical nature and was able to speed up the healing process miraculously.

Contemplating her newly unblemished body, Lin experienced a moment of bliss. The metal rewarded her with another burst of teasing that made her pelvic muscles twitch around the intruders stuffing her, but it ended before she was pushed over the edge. She willed the metal minion to continue or at least free her arms to let her engage in some old-fashioned masturbation, but her request was denied. Obviously, the sway she held over it was strictly limited, so she had no way out but to keep calm and carry on by directing her attention towards her bondage.

To relieve her submissive urges, she frequently watched bondage clips or read pertinent stories on the internet and over time had found herself compulsively drawn to the more extreme end of the spectrum. Best were the tales that chronicled how the hapless heroine gradually got in over her head, until she ended up in lifelong slavery, preferably against her loud protests, yet in line with her secret desires - albeit taken to unanticipated extremes. Bonus points would be awarded if the reluctant slave was equipped with permanent shackles and her body perforated by serviceable and demeaning piercings. Although those stories were often far from realistic, they never failed to arouse Lin and her mind automatically turned towards them now.

Featured in her favorite tales were a number of stringent bondage positions she had always wanted to try, but that were far beyond what could be accomplished with self-bondage alone. Somehow, she had gained the knowledge that even the most strenuous, long-term bondage would not be allowed to do her harm; the Mistress' minion would take care of that, ensuring that her blood flowed unobstructed and that her muscles did not atrophy. Lin could not decide whether she should feel reassured or frightened by that tidbit of information, yet her libido welcomed it unequivocally; and to aggravate matters further, it was not her rational mind but her raging libido that had been artfully manipulated to be in charge of her transformation.

Readily obliging her out-of-control desires, the metal drew her arms behind her back, gradually forcing her forearms together until her elbows were tightly pressed against one another. For a moment, Lin reveled in the ease with which her elbows met, although she had expected nothing less: She had always been flexible and kept herself supple with gymnastics, even after she had given up ballet to concentrate on her studies; besides, being slender and willowy certainly played a role as well. Unfortunately, always the over-motivated achiever, Lin was constitutionally unable to content herself with such an easy win, but felt compelled to push herself harder and found a congenial accomplice in the metal.

It slowly twisted her arms around until her palms were pressed together at the small of her back, fingers pointing towards her head. Next, gently but inexorably, her forearms were drawn towards each other, so that her hands were forced up her spine, while the gap between her elbows shrank. The metal exerted a steady pressure and, working like a ratchet, capitalized on every millimeter her muscles and tendons yielded. Soon the strain became painful which only served to stoke the fire in her loins higher, while the rational part of her looked on in impotent horror. Instinctively, she knew the process would not stop until her arms had achieved the perfect reverse prayer position.

With her arms being taken care of, her thoughts wandered towards her legs. The mesh forcing them together was certainly effective, yet in her considered opinion unsightly. Lin much preferred the shackles of the classical slave girl look. The metal apparently concurred and reconfigured itself into bands that flowed around her ankles. For sure 8 cm wide and half a centimeter thick, they held her with an authoritative grip, yet somehow did not bite into her Achilles tendons when she experimentally rotated her feet. The latter, however, was deemed an unwanted degree of freedom and so the metal also linked her big toes to the strand she depended from, forcing her feet into a strict en-pointe configuration.

Inevitably, the topic of her genitals came up next and although the metal had already proven to be fully in control of her lust, Lin nevertheless clung to the belief that a slave girl's access to her own sex should be barred by physical means. The tight belt around her middle constituted a promising start and soon was complemented by a tight, U-shaped crotch piece that sealed her stuffed pussy and rectum behind a formfitting, impenetrable shield. In a somewhat misguided effort to reassure her, the metal revealed that it was perfectly capable of taking care of all her bodily wastes and hence there was no need to unlock her loins for hygienic reasons, ever. As if to rub in the fact that sexual gratification had been taken out of her hands for good now, another near-orgasm shook her for several minutes and the poignancy of her unfulfilled yearning skyrocketed once again.

"Nnnhh!" Lin groaned into her gag when she was once more denied the climax she so desperately longed for. Resuming her quest to become the ideal slave girl so she might be granted release from the unbearable tension at last, her feverish thoughts now focused on her gag. Although the lump in her mouth effectively inhibited intelligent speech, she figured it could definitely be improved upon. In her favorite stories, the unfortunate heroines always had their heads imprisoned within a full head harness. The metal seemed to approve of this notion as well, since the mesh that had ensnared her head reformed itself into a set of flat straps that fastened a wide panel in front of her mouth, complete with an integral deep cup for her chin.

However, that was not the end! At the same time, the metal inside her mouth expanded, forcing her jaws even further apart and also flowing between cheeks, gums and teeth to fill every nook and cranny of Lin's oral cavity, while her tongue was captured in a pouch that immobilized it completely. The appendage that went down her esophagus developed into a veritable feeding tube, with its lower end firmly anchored in her stomach. Although she was already resigned to the futility of her efforts, Lin simply had to test the beefed-up gag and so she screamed at the top of her lungs and tried to somehow expel the intruder from her mouth, both efforts meeting with negligible success, if you discounted becoming seriously short-winded and a little light-headed.

Like all her other restraints, the head harness fit like a glove, with its straps pressed deeply into her features and its panel hiding the lower half of her face from her chin to just below her cheek bones behind an unbroken expanse of shiny metal, except where the feeding tube's external socket marked the position of her concealed mouth. Since the metal would ensure that no dental or other issues arose, Lin realized with horror that with this arrangement she could very well be kept gagged indefinitely. Being forced to endure a gag for days on end was fantasy she had frequently entertained, but now that it threatened to become reality, she was of two minds about it: The sensible one abhorred the idea while the other unabashedly rejoiced. Clearly, if she ever got the chance, she would urgently have to work on curbing her libido's impulsiveness. At least, she was confident the metal would spare her the agony of sore muscles commonly associated with the way her jaws were spread wide apart now.

It was a foregone conclusion that her collar had to be upgraded as well, after all it symbolized her new role like no other item could. The metal band around her throat widened and thickened while around its circumference, at the front, back and both sides large, swivel mounted rings formed. A slave girl needed a collar that unequivocally stated she was owned and the 10 cm high, 5 mm thick, seamless tube now snugly encircling her neck fit the bill perfectly.

Lin could not help but imagine herself being paraded naked and leashed by her new collar in front of her fellow students. Doubtlessly, they would use the opportunity to gloat over her downfall from annoyingly prim and proper model student to wanton sex slave, her real nature openly revealed to all. Maybe she would even have her orifices unlocked and be forced to service them sexually? She shuddered, yet the imagined humiliation acted as a strong aphrodisiac and in an involuntarily reaction she squeezed her legs together, tensing her pelvic floor muscles so that the intruders in her loins made themselves felt even more poignantly. A wave of lust suffused her, but still it was not enough and Lin sobbed in frustration.

Meanwhile, the inexorable pull of the metal had forced her forearms into close contact along their entire length, so her helplessly fluttering fingers grazed the nape of her neck. As soon as her arms had reached their final configuration, the metal reformed into wide cuffs around her wrists that were attached by means of a short, rigid bar to the bottom edge of her collar. Another set of rigidly joined cuffs around her biceps kept her elbows pressed together and also connected them to her belt, thus locking her arms into the double-jointed position of a full reverse prayer.

This was the ultimate bondage of her dreams brought to life, which made enduring the sweet ache in her arms worthwhile. The feelings engendered by the awareness of her absolute helplessness were overwhelming and for a little while, Lin forgot everything around her, just relishing her pain and the euphoria of finally allowing her mind to just soar in the moment and let go of all the mental baggage that usually weighed her down. Unfortunately, the precious moments of pure sensation and blissful oblivion passed all too soon and were again replaced by the unbearable sexual yearning. Lin had almost dared to hope this consummation of her bondage would finally provide the last drop that allowed her pent-up lust to spill over into an gargantuan orgasm, but her alien Mistress' minion was implacable.

By now, her appearance matched her mental image of the perfect slave girl much more closely, yet there were still discrepancies. She instinctively shied away from thinking about them, frantically trying to flood her mind with memories from harmless childhood days instead; anything to drown out the unbidden images conjured up by her supercharged libido. Scenes from carefree summers spent playing with the kids from the neighborhood repeated before her mind's eye. She fondly remembered that "Cowboys and Indians" had been a favorite, yet in hindsight it maybe was a little odd how often she'd ended up tied to a tree ...

'Oops!' In panic, she scrambled to summon up some less dangerous memories. Her first boyfriend for example had been sweet and caring. He would never have done anything to hurt her, unfortunately. Such a pity that he'd been so clearly out of his depth when he found the handcuffs she had 'accidentally' left lying around. Since he had been puzzled by the simple cuffs then, how would he react if he saw her now? Or worse, adorned the way she was supposed to be ...

'Fuck!' Apparently, her desperate efforts were doomed to fail. Ordering herself not to think about something invariably provoked the exact opposite result. Maybe it would be for the best if she ceased her futile evasive maneuvering and simply embraced her inevitable fate. After all, it were her own secret fantasies that would shape it. Despite the voice of reason screaming at the back of her mind to stop, she succumbed to her irrepressible desires and once again turned towards her favorite stories, in which slave girls were not only helplessly enchained, but also adorned with extreme piercings that rendered them even more controllable.

The metal rewarded her renewed compliance with the desired mode of thinking with a spike of pleasure that made her gasp. Analogous to what it had been doing to her arms, it had put her mind into something akin to a mental ratchet that propelled her down the route to an ever deepening enslavement. She saw through its tactic, yet could not change course regardless.

"Aiih!" Lin screamed into her gag when both of her breasts were perforated horizontally behind her nipples, through the areolas. This was accompanied by intensely stinging sensation that quickly subsided, since the metal was working its magic to dampen the pain. Not that Lin would greatly have minded the pain, being as filled with masochistic bliss as she was. The metal quickly enlarged the piercings, then formed grommets within the wounds while simultaneously healing and strengthening the tissue surrounding them. Two thick rods filled the openings and were immediately complemented with sturdy U-shackles that outlined the lower halves of her nipples.

Next, she felt her lower lips grabbed and stretched. In rapid succession, each of her outer labia was pierced five times and the resulting holes immediately fitted with more of the wide-flanged grommets. Of course, the grommets were not left unoccupied for long, but soon played host to sturdy bolts joining her lips to the protective shell that covered her pussy, splaying her sex wide open. Unfortunately, that was not all.

Forced to go ever deeper down the rabbit hole of her masochistic fantasies, Lin moaned in dread when she felt a tight metal collar clamp itself around the base of her clitoris. As it turned out, her fears were well founded, when a thick metal pin speared through her compressed flesh and thus irrevocably anchored the collar to her body. Adding insult to injury, another U-shackle formed on its outside, turning her forcibly lengthened, sensitive nodule into the fastening point for a most intimate leash. Although only some unseen hook snagged the shackle and locked it to her chastity cover for now, the persistent, irritating pull on her clitoris acted as a disconcerting preview of future woes.

All her new piercings throbbed in time with her racing pulse, yet apart from the initial spike of pain when her flesh had been perforated, Lin was spared from any more serious discomfort. Within seconds, the metal repaired the damaged tissue, integrating the grommets into it as if they had always been part of her body. Consequently, there was no lengthy healing period to consider before her Mistress could make full use of her new attachments. It also meant that the metal could continue its assault indefinitely without endangering its victim's physical health. Albeit Lin's mental well-being was a different matter.

Her mind was still riven between reason and passion; the former abhorring her ever worsening debasement while the latter rejoiced in the incredible eroticism of her absolute submission. The wetness in her crotch attested to which side kept winning the argument. Lin had obsessed about such outré fantasies for years, always secure in the knowledge that they could never come to pass. However, now that the metal had moved them into the realm of the possible and attainable, the temptation to actually experience them became irresistible. The knowledge that she was doing this to herself provided the sweetest of agonies.

Done with her crotch, her relentless masochism's focus moved upwards again. Or downwards actually, if Lin chose to take her current, upside-down configuration into account. Either way, although thoroughly immobilized already, it was now her tongue's turn to receive the metal's biting attentions. A triangle of large bore holes was pierced through the muscle, the central one three centimeters in from the tip. After the customary grommets had formed, more of the metal flowed through their openings and fused her tongue to the solid mass that filled her mouth. Unless she could get the metal to withdraw again, expelling the gag had become absolutely impossible, at least if she did not fancy to rip out her tongue in the process.

The subsequent piercing and eyeletting of her earlobes and their incorporation into the head harness was anticlimactic in comparison, yet it was only the prelude to the final act of the drama. When Lin felt the metal sliding high up into her nose and clamping tightly onto her septum, she knew what to expect. She pressed her eyes closed and screamed when with a sharp pain a sizable hole was neatly punched through the cartilage. Immediately, the hole's edges were infused with particles of the metal that healed the wound and formed an eyelet strengthening the tissue. For a second, Lin hoped she had endured the worst of it, but she should have reckoned that all of her most extreme fantasies were to be realized ... in full.

Both wings of her nose on either side of the central hole were pierced and grommeted as well, then a thick metal shaft grew to occupy the openings and transfix her entire nose. It in turn served as the axle for the arms of a U-shackle whose tip reached halfway down to her upper lip. This clearly was no delicate piece of jewelry, but another serviceable anchor point, ready to accept a devastatingly effective leash. The metal immediately put it to good use when it sprung up a fixture on her mouth shield that caught the shackle and thus linked her nose to her head harness as well.

'Yes!' It was done. She had done it. Now she found herself hanging upside-down from a tree, naked, helplessly bound by wide cuffs tightly fastened around her limbs, pierced with demeaning shackles through her nose, nipples and clit. Locked into a chastity belt, with her pussy and anus stuffed, gagged to the max and forced to stomach a feeding tube, so she could stay this way. A fetishist's dream, her dream, come true! Now that fantasy had become reality, the repressed, masochistic part of her that had dreamed up all this rejoiced while in the back of her mind, her former self desperately clung to one comforting, unexpressed thought ...

Lin felt a flash of heat when she imagined herself helplessly restrained in this manner for hours or days on end, with nothing to keep her occupied but the urge to find sexual release. With relish she tried to pull her tongue out of its pouch in her gag, reveling in the ultimate intransigence with which the piercings kept it trapped. Likewise, any attempt to open her mouth further was met by the unyielding resistance of her head harness, its metal straps digging into her skull. She imagined being led around by a leash to her nose ring, any attempt to resist instantly and effortlessly overcome by the painful tug on the sensitive organ.

Almost as an afterthought, the metal combed through her long hair, arranging it in a complex braid with threads of metal weaving themselves into the strands while at the braid's end, a ring offered a convenient means to incorporate it into her bondage. Lin felt her head pulled back by her hair, until she was forced to stare straight down at the forest floor a meter below.

With the last degree of freedom removed, her arousal spiked once more. The metal stepped up its clever manipulation of her erogenous zones and this time she knew her unconditional surrender to its demands had earned her the release she desperately craved. For now, though, it played its favorite game with her again, supercharging her with pleasure, then holding her back right at the brink. She was riding the breaking wave of an enormous orgasm that would surely lift her right up the shores of paradise.

'Soon!' Lin held her breath in anticipation. She was so close now! And when she had finally found release from the throes of sexual frenzy she could plead for having the changes to her body reversed - surely, what the metal had wrought, it could undo again. The traitorous thought had popped unbidden into her mind and was immediately punished by an agonizing shock to her tongue that acted like a cold shower, killing her buzz instantly. Once again the orgasm was lost.

"Nnnhh!" A desperate howl escaped her throat. This was not fair! Yet the heroines in her favorite stories did not get to play at being a slave for just a short time, so neither would she. The sudden awareness that there indeed was a way to make her body modifications permanent struck Lin like another electric shock. Cold sweat beaded her brow. Her neocortex informed her that she did not really want to go down this route, but her lizard brain begged to differ. Granted ascendance for once, it drowned out the small voice of reason that wailed in terror, finding a willing partner in crime in the metal that eagerly complied with the wish to make her bondage irrevocable.

It started with her piercings. The grommets capturing her flesh became very hot for an instant, despite the metal's best efforts to dissipate the heat. Somehow Lin knew that the affected portion of the metal had lost its shapeshifting capabilities and irreversibly changed its molecular structure into something far harder than steel, impervious to the best tools known to man. The process repeated itself with the U-shackles that occupied her nose, nipple and clit piercings, then was extended to the cuffs around her wrists and ankles, but left out the links between them, though Lin did not learn that yet. Callously, she was led to believe she would be forced to endure the reverse prayer bondage for the rest of her life, never having use of her arms again!

The transformation of her manacles progressed more slowly on account of the their greater mass and the commensurate amount of heat that was generated. Moreover, the innermost layer of the metal kept its adaptability, so her circulation and the mobility of her joints would not be unduly impaired despite the cuffs' skin-tight fit, whereas on their solidified outside a plethora of new fastening points sprung up which the metal connecting them latched onto now.

Her skin prickled maddeningly when thousands of microscopic filaments of the metal grew from the cuffs into her flesh and anchored themselves to her very bones. Similarly, more fibers permeated the tissue that played host to her piercings and ensured that nothing short of letal force would be able to rip any of the grommets out of her body. Once again the metal proved absolutely uncompromising in its implementation of her half-baked fantasies.

The last pieces to be made permanent were the belt around her waist and her collar, which were retrofit in much the same way. Lin was not entirely sure whom to thank for the fact that at least the crotch piece of her chastity belt remained removable: Maybe it was some policy set by the Mistress herself that had saved her from going completely overboard, since in her current state of mind, even the thought of being kept chaste forever appealed to her rampant masochism. In any case, the awareness that the metal was irrevocably trapping her in bondage of her own design propelled Lin's desire again to its previous stratospheric heights, so the sensations of heat and prickling around her throat that announced the permanence of her collar nearly pushed her over the edge. Nearly, because this was when she learned that - despite its now inert form - the metal in her nipples and clit was still capable of transmitting sobering electric shocks.

Once more beside herself with unfulfilled yearning, Lin tested the limits of her freedom (or rather confirmed its complete absence) and strained manically against her restraints, relishing the authoritative grip of the cuffs on her ankles and wrists. Almost of their own volition, her pelvic muscles clenched so she felt she the intruders in her vagina and rectum even more acutely now that they had resumed their inescapable, tormenting teasing. She even enjoyed the discomfort when her tongue surged against the piercings that mated it to her gag and the drag on her nose shackle when she tried to toss her head from side to side, blithely putting up with the painful jerking on her trapped hair. Each sensation provided incontrovertible proof of her enslavement and sent another spark along her spine that further stoked the fire in her loins. But still the metal did not allow her to orgasm, as if it wanted to flush out the last vestiges of concealed thoughts of resistance.

But Lin had been thoroughly conquered and her will to resist obliterated by the constant barrage of her own fantasies having been turned against her. After she had accepted defeat by her own hand, the only thing that still mattered to her was the fulfillment of her lust. Beads of sweat ran down her hot skin, while she desperately tried to suck in enough oxygen to sustain her hammering heart. Her body was tight as a bow-string, with the tendons standing out like ropes under her pale skin and every muscle locked in a spasm of pleasure bordering on agony. Teased and tortured past breaking point, she felt a microsecond away from loosing her sanity when the metal finally relented.

"Aahhh!" A shrill scream ripped from her throat and broke against her gag. Lin's eyes became wide as saucers before she squeezed them shut. Wave after wave of uncontainable contractions rippled through her taut muscles, shaking her dangling body like a leaf in a storm and all conscious thought evaporated in the blinding heat of the supernova ignited by the sudden release of her pent-up pleasure. For a timeless sliver of eternity, Lin just existed as pure sensation in the unfathomable bliss of that supreme orgasm of her life. Surely she had died and gone to heaven!

Alas, as a mere mortal she had no claim to permanent residency in heaven, so when at long last the massive orgasm and its innumerable, follow-on climaxes had run their course, Lin found herself expelled from paradise, dangling above the forest floor once more. Reluctantly winding down from her high, she opened her eyes just in time to see a tall figure materializing out of thin air in front of her. It took her a second to overcome her surprise and make sense of the upside-down view she was presented with.

The athletic body was humanoid and as the skintight, black suit revealed clearly female, yet next to its imposing height of at least 230 centimeters Lin's own 181 centimeters would make her look like a child. The only part of the alien's body not covered by the matte black material of the suit was the head, where pale skin with a faint golden tint was framed by long burgundy tresses that seemed animated by a life of their own. The face was that of an stern Greek goddess with the luminous, golden eyes being the most striking of her perfect features. They fixed on Lin who could not help but shudder under the piercing gaze. She sensed that her innermost secrets lay bare before her beautiful Goddess' penetrating eyes. Involuntarily, she squirmed and clenched her thighs, provoking her captor to show her gleaming teeth in a lazy smile. Lin's breath caught when she noticed the elongated canines that raised associations of a most disturbing nature.

For a split second she struggled mindlessly, then got a grip on her panic. If she had just been intended as a snack, her elaborate enslavement would not have served any purpose. No, her captor must have something far more devious in mind for her.

"Fear not, my little pet!" The soothing contralto voice spoke directly to her mind. "We'll have so much fun together ..."

Lin was looking forward to it.

Epilogue

Mia-la looked down on the human female and smiled. For an hour, she had stayed hidden and feasted on her prey's raw emotions before switching off the lightbender and revealing herself. Still, the taste of the young woman's desperate need, guilty pleasure and exquisite pain lingered as a heady afterglow in her mind. This one she would definitely keep for herself.

With wry amusement the huntress contemplated the restraints her new pet had chosen for herself. The heavy shackles were quaint in their primitive, hardware obsessed style, especially since the smart metal symbiont evidently provided so much more sophisticated means of control. Nonetheless, they reflected the auspiciously submissive girl's own self concept and therefore would help her come to terms with her new role much more quickly. Besides, Mia-la rather liked the brutally blunt message they conveyed. She considered equipping the other specimens she had collected similarly, but would need to run this idea past her prospective buyers first.

Mia-la was the product of millennia of coevolution of natural and artificial intelligence. Although her physical appearance retained much of her ancestral humanoid matrix, her mind was a different matter altogether. Honed by generations of genetic meddling, it far surpassed that of any human. However, what her species had gained in intellectual prowess, it had lost in the capacity to experience raw emotions, yet the telepathic abilities acquired in the exchange made up for the loss somewhat: They allowed its members to tie in with the primal emotions of other, compatible species, glorying in their sensations like an intoxicating drug. Humans with their barely domesticated feelings worked best, turning them into a highly sought-after commodity.

Yet even among the teeming masses that populated their little planet, Lin stood out as a rare gem. Her feelings transmitted exceptionally true and her masochistic nature practically guaranteed that Mia-la would be able to elicit an especially delicious mix of the strongest emotions from her: love and hate, pleasure and pain, all intricately blended together into one heady cocktail. To boot, all that came packaged in an appealingly cute and highly sensitive body. The huntress experienced something akin to elation when she considered that thanks to the metal symbiont, she would have the young woman at her disposal for centuries to come.

From the moment the decision to collect Lin had been finalized, self-replicating, microscopic particles of the metal had entered her bloodstream and allowed themselves to be transported everywhere. Wherever the nanites settled, they got to work repairing her genes, rejuvenating her cells, strengthening her bones and quickening her healing. In a way, Lin was to become the super heroine she had fantasized about, although she would never get to play the role of caped vigilante. Instead, the metal was turning her into the unbreakable plaything of a most demanding Mistress.

The last but not least changes the metal had set in motion concerned Lin's brain, which was being tuned to operate at peak capacity, activating all its underutilized reserves. In the future, she would also be given intellectually challenging tasks to ensure that she honed her mental faculties regularly during the periods her Mistress had no use for her. Over time, Lin would quite probably become the most intelligent human being in existence - Mia-la was not interested in owning a lackluster and dull pet.

Collecting her counted as the perfect conclusion to a successful hunting season. All that was left to do was to get her to the ship and feed her; the ongoing changes required energy which the metal took from its host's body, so once Lin calmed down enough she would be starving. With a mental command, Mia-la ordered the metal to get them ready to leave, which for Lin meant that the strand connected to her braid shortened while, simultaneously, the one holding up her feet lengthened, slowly inverting her upside-down configuration until she dangled from her hair instead.

Next, her toes were released and the link holding Lin's ankle cuffs close together extended, granting her a fighting chance to keep up with her Mistress' long stride. When snug metal ankle boots formed around her feet, Lin was relieved at first that her delicate soles would be protected from the rough terrain, up to the moment the boots turned rigid and she realized that her new footwear would continue to enforce the torturous en-pointe position. She endured this latest imposition with gallows humor; at least she had possessed the foresight to prepare herself for such an eventuality by taking ballet lessons when she was younger. Nevertheless, Lin was glad when the metal finally set her down and thus freed her from the increasingly aggravating burning of her scalp.

While she was still trying to find her footing, a leash extended from her septum shackle and wrapped itself around Mia-la's waiting hand. A painful tug on her tender nose was the signal for departure.

"Come pet, we're going home!"