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Rated: 18+ · Fiction · Adult · #2333251
Muscle growth fetish story with Samus from Metroid, a mysterious serum, and muscle worship
         Somewhere, in a far off star system, a certain bounty hunter was busy at work training herself. A woman of little words and of great physical prowess, Samus Aran constantly expected herself to be at peak performance, practically a prerequisite for being one of the finest bounty hunters in the entire galaxy. Yet for all her impressive strength, cat-like agility, and resilient constitution, Samus was in a place she dreaded - stagnation.


         Samus had long feared the day when this would happen. Her well-toned body, lean and defined like a professional gymnast, was one that any woman would take pride in, but even then, she always yearned for more. More mass, more definition, more flexibility, more power, Samus wanted it. Yet, after a grueling week or two of particularly exhausting workout and exercise, she had nothing to show for it. After taking a long shower and slipping out from her gym clothes to her Zero Suit, Samus trudged out from her bathroom and to her bunk, where unceremoniously, she let herself flop onto it, equal parts exhausted and disappointed in herself.


         "Uuggghhhhh," the blonde bounty hunter groaned into her pillow, "I can't deal with this anymore." Rarely did Samus admit defeat, but having plateaued in her growth, she was ready to throw in the towel. Clutching the pillow close like a stuffed toy, she rolled onto her back and stared at the compartment's roof, contemplating her current lack of growth. "Well, so much for being genetically altered with Chozo and Metroid DNA," she murmured resignedly to herself, "You'd think that I'd have some sort of mass to me, but nope!" The chirp of a new message being received shook Samus out of her melancholic self-pity, and tossing the pillow aside, she scrambled over to the computer relay mounted on the wall. A slap against the console, and with a series of beeps, the computer relayed the report to its owner:


         "To Miss Samus Aran: As one of the finest bounty hunters in the galaxy, the Galactic Federation has selected you as a subject for the Compound 53-X Program. The compound is designed to enhance the strength, dexterity, and mass of a subject in order to provide them with superior combat capabilities. With your reputation preceding you, it has been deemed that you receive a shipment of the compound for experimentation. An automated shuttle has been deployed to your last reported location - it is requested that you remain there to receive it and submit a report of its effects on you to its AI."


         This was too good to be true! A serum to give her body a massive boost to it, just as she was ready to give up on training herself further? Either this was some sort of trap by pirates or some experiment gone rogue and she had to clean up the mess, but then again, there was always the chance it was genuine. If it was, it would be a godsend! Licking her lips in anticipation, Samus quickly sent out a reply, eagerly accepting the compound's delivery, and giddy at the chance to get bigger once again, she tossed herself back on her bunk, letting herself fall asleep and her dreams filled with ideas on what she could do once it arrived.


         The next few days were agonizingly long. Without any contracts to fulfill. being requested to stay in the same system, and giving up on working out until after receiving the compound, Samus spent her time waiting and waiting, her patience slowly being whittled away by the speed, or for her, the perceived lack thereof, of the shuttle. Her tolerance of boredom would be rewarded, though, when finally, one of her gunship's scanners picked it up, and after some finagling, the two ships docked with each other. Fast as a lightning bolt, Samus dashed over to the medbay, and with bated breath, she watched as a pair of drones unloaded their goods, connecting a peculiar device to the computer system.


         She had to admit, it was a strange contraption. At the device's heart was a glass tank about half her height, filled to the brim with a bright green fluid, presumably the mysterious Compound 53-X. On top of it sat a sextet of small pumps, and connected to each one was a long plastic tubes capped with a sharp needle. A display on the tank showed several sensors, each one to monitor the user's body as it was given the serum. As simple, if not crude, as it was, there was something about it that made Samus's heart flutter. What was going to happen to her body once the compound was administered? Were there any side effects? What would her new limits be? What was it even going to feel like? There was only one way to find out, and steeling herself, she approached it.


         "Is subject Samus Aran ready?" one of the drones inquired as it connected the device to the ship's computers. "Ready to begin," she replied, giving the drone a nod. She was more than ready - she was ready to just snatch the tubes out of the drones' claws, jab them into herself, and pump herself full of the compound, to hell with the experiment! The drone took a moment to register her response, and would lead her to the lone bed in the medbay, where she stretched herself out and kept her eyes locked onto the canister containing the compound, head racing with ideas on what the fluid inside would do to her. The drones went to work, guiding the tubes towards her and then letting each one connect to her body.


         Samus shuddered as she felt the needles be jabbed into her veins, the cold metal stinging like ice. "Are this many injectors necessary?" "Compound 53-X requires multiple points-of-entry for optimal distribution throughout the body," a drone responded, its voice never going beyond a flat monotone. "Uneven distribution may lead to unintended side effects or errors in the process," the second chirped, "Ship's computer system now taking over." The blonde bounty hunter gulped at the second's remarks. "Errors in the process" was a very obtuse way of saying something could go disastrously wrong, from horrid mutation to the possibility of the serum killing her, which to say the least would be disastrous. And yet, consequences be damned, Samus wanted to leave the plateau her body was on far behind. "Start it," she ordered, and with a whistle, the computer began to pump the compound into her body.


         Even for someone has been through as much as her, Samus gasped in shock as she felt the compound flow into her bloodstream. The cold of the metal blossomed into a bright heat, making her twitch and jerk as it spread. "Initial disturbances registered within subject," the computer reported, "Subject is asked to keep self calm." She glared at the machine, but eventually, she complied as the heat died down from the feeling of a raging blaze to a enveloping warmth that wrapped around her. Beads of sweat rolled down Samus's face as her heart slammed against her ribs with each beat. Already, her athletic build started to change as her muscles slowly, but steadily, absorbed the compound, making her mewl in a mixture of pain and pleasure as Samus watched her body expand from a gymnast's to a particularly bulky fitness model.


         "Detecting changes in hormonal behavior," the computer droned, "Would subject like to preemptively cease administration?" Hearing the computer even dare to suggest stopping snapped Samus out of her daze. "No, ignore any changes like that," she barked as she watched her abs tighten and, through the tight fabric of her Zero Suit, form a toned six-pack. A dreamy smile crossed her face as she gently tightened her core, letting out a purr as she watched them flex. "Continue delivering the compound." Now that she thought about it, this was starting to good! It was like weeks of working out in concentrated form, with the results unfolding right before Samus's eyes! Her thighs swelled against the Zero Suit, the muscle of her quads forming thick sinewy cords, and Samus could only watch with satisfaction as they gradually started to sink behind her expanding chest, her pectorals starting to siphon away the fat of her breasts in exchange for rock hard meat.


         Her body having graduated from fitness model to professional female bodybuilder, Samus let a giggle escape her as she started to tense her muscles, rippling with definition that said bodybuilders could only dream of. "C-computer," she panted, eyes never looking away from her beautifully sculpted form, "How far along are we?" The pumps paused briefly, giving the computer time to issue a response: "Approximately 33% of Compound 53-X has been administered to subject Samus Aran." Wait a minute, just thirty-three percent‽ She was already pushing the size of a large bodybuilder! How massive was she going to get‽ "Only thirty-three percent‽" Samus stammered, "How am I this muscular already‽" "Subject Samus Aran specified that no further anomalies be reported," was the computer's reply, as cold and mechanical as ever, "This included unexpected reaction by Compound 53-X to presence of Chozo and Metroid DNA in subject's body, causing substantially increased muscle growth. Would subject like to continue with distribution?"


         Samus's face when white as she processed the computer's statements. How massive was she going to be when this was done? Hopefully, she would at least have some room to move around her ship, otherwise she'd have to have someone cut it open to get her out! For all her dread of being a wall of meat, though, another part of Samus was utterly radiant with excitement. Muscles thick enough to stop bullets and strong enough to bend metals with ease? She would be unstoppable! Gulping down the knot in her throat, she took a ragged breath to steady herself. "Negative. Continue onwards until complete or a problem arises," she ordered as she readjusted herself in the bed. A smirk crawled across her face as she felt the pumps start up again, the Compound 53-X once again working its magic on her body: "Let's see how big I can get."


         Her body started to swell once more, and Samus couldn't help but give herself quick little flexes, not only enjoying how before her eyes, her muscles grew, but to see if the serum being pumped into her would react. Her veins throbbed as they danced across her expanding bulk, feeding more of the compound into the pound after pound of girlbeef that covered her body, now rivaling the size of a large male bodybuilder. "Compound 53-X now 50% administered," the computer blared. Halfway there, and inside her head, Samus was ready to pop. The feeling of her muscles swelling with size and strength was intoxicating, more than any drug, and she was ready to scream at the computer to pump every single remaining drop of Compound 53-X into her all at once. Yet barely, just by a hair's breadth, was her common sense coming out on top. She'd let it take its time - she was inflating like a balloon anyway, so might as well enjoy the feeling.


         Nearing the two-thirds of the way mark, Samus was starting to sweat bullets as she got a close-up view of her muscles surge with power. Her abs, while still a mere six-pack, were chiselled with the detail of a professional sculptor, pressing tightly against her Zero Suit. Flanking them were waves of deeply cut obliques that rippled outwards until they came close to her wing-like lats. Giving her now volleyball-sized biceps a good pump, she whimpered and grit her teeth as she felt them stretch her Zero Suit. The urge to just get up and flex as hard as she could was starting to gnaw at her, and it took every ounce of her willpower not to give in. All she had to do was just coast through the rest of the serum being pumped into her, and then she could go ham on whatever muscle lust was getting pent up inside her. She'd be fine, right?


         By the time the computer announced it was seventy-five percent of the way done, Samus had gone all in on what limited worship she could give her brawny body. Her boobs had disappeared into the ether, replaced entirely by the thick slabs of beef that were her pecs, and while she did make sure to give them kisses and little bounces, she had to hold herself back from flexing them as hard as she could. The computer had already chastised her for flexing too much, raising the risk of dislodging a needle and messing up the entire process, but good GOD, was she ready to pop. Each breath she took was heavy and labored, the feeling of her muscles exploding and reforming to be harder than steel an aphrodisiac for her. "Ahn~ al- almost theeeeere," she cooed as she clenched her glutes, feel each sinewy mound tighten like a vise. "Compound 53-X now 90% administered." The finish line was right there, now more than ever she couldn't foul this up! "95% administered." Almost, almost!


         "Compound 53-X fully administered," the computer stated as it made a noise to signify its work had finished, "Would subject Samus Aran like to conduct tests regarding her improved capabilities?" The combined feeling of her growth finally coming to an end and the needles finally being withdrawn from her body gave Samus a slap in the face, the energy of the compound quickly draining away. With a weary groan, Samus slid off the bed, her boots making a heavy thud as they hit the floor from the massive increase to her weight. "That was… far more pleasurable than I thought it'd be…" she wheezed as she caught her breath, "Is it supposed to feel like that?" "Negative." The unexpected response of the computer made Samus blush. "I see…" "Does subject Samus Aran wish to conduct tests regarding her improved capabilities?"


         Samus was still panting like a dog. Whether she could deflect a bullet with her meaty chest or not was the least of the blonde amazon's concerns, and wiping the sweat off her face, Samus frowned at the computer. "Not yet," she replied, brushing her bangs, now matted to her forehead, aside, "Need time to… gauge the results first." Already, she could tell the that not only was she far bulkier, she was taller too! Already an impressive five-foot-ten before, she loomed over everything around her. She didn't even feel this big in her Power Suit! Taking gentle steps, her legs bulged and rippled at the tiniest movement as she waltzed from the medbay to the bathroom, coming to face to face with the full body mirror that lined one of its walls.


         When she saw her reflection, her jaw dropped. To say that Samus was now muscular was but an understatement. Looking herself over, she was downright amazonian! Having shot up a good foot or so in height, her Zero Suit was stretched even more ridiculously tight over her musclebound frame, which made even the largest bodybuilders look slim in comparison! Awestruck, Samus raised up her arms and gingerly gave them a flex, her face flushing red when she saw her biceps bloat as big as they could. Each one was nearly the size of her head, if not a little bigger, and mirroring them in size were her bulging triceps and pumpkin-like shoulders, while her forearms, their muscles dancing whenever she moved them, were almost as thick as her thighs were before taking the compound! And that was just her arms!


         Her bullish neck muscles strained against the collar of her Zero Suit, while behind them, meaty traps rose up like a mountain range, gently brushing against the back of her head. Spinning around on her heel, Samus, struggling to look past her traps, watched them melt into her meaty back, surging with endless cords of sinew and beef, and just as wide as the mattress of her bunk. Below that, the twin hemispheres that were her glutes proudly jutted out, showing off their finely sculpted striations whenever her hips swayed side to side. Below that were the cantaloupe sized spheres of her calves, tantalizing Samus with how perfectly round and hard they were. To test them out, she turned back around to face the mirror, and sticking a foot out, she pointed it, her blush only brightening as she watched her calf balloon, and much to her surprise, elation, and just a hint of embarrassment, she swore that the bottom of her Zero Suit tore ever so slightly.


         She had to take it off. Partially to preserve it, and partially to bask in the sheer might that she radiated, Samus needed her Zero Suit off now, and fast. When push came to shove, though, it was no easy task. Struggling to reach behind her vast back and undo the zipper, she then had to peel it off, a delicate struggle of taking off what was essentially something so tight on her it was a second skin, and trying not to tear the poor thing apart. Inch by inch, more of her skin, and her muscles, of course, would be exposed to the world, and after several agonizing minutes of trying to take it off, she finally let it drop onto the floor.


         The titanic bounty hunter was amazed at what she saw. Aside from the lack of clothing and that her tits and crotch were out on display, she was floored by the fact that apparently, the Zero Suit was stretched so tight that she was already seeing every pumped to the gills with Compound 53-X even with it on! Each quad was overstuffed with meaty cords, thrumming and throbbing with power. Above them, her abs and obliques rippled, carved with such fine detail that Samus was sure that even the most veteran sculptor would be jealous of them. Her lats, vast and wide like a pair of wings, exaggerated an hourglass figure, ready to shred apart any top that she would dare try to put on. Then, there were her pecs.


         The juiced up slabs of thick girlbeef that were her pecs throbbed with each breath she took. Each one nearly twice as big as her head, Samus drooled as she instinctively gave each one a bounce, shuddering as she did so. Each monstrous brick of muscle was perfectly round, like a pair of pillows attached to her chest, and were each crowned by a thick vein that pulsed in time with her heartbeat. She had seen some beefy people in her life, but this was insane. Her chest alone probably had more muscle than they did in their entire upper bodies! Gently cupping each one, Samus bit her lip as she massaged them, feeling the sinew being toyed with by delicate fingers.


         Letting go of them, Samus made almost painfully slow movements as she flexed and pumped her unreal physique. Reveling how each muscle bulged and surged with the most minuscule of movements, the behemoth blonde savored them like a well-cooked meal, the salty taste of sweat as it dripped down her face lapped up by her tongue as she licked her lips. Tensing her chest, she bent her head down and planted kisses on each mountain of a pec, each one sending an electrifying jolt down her spine. "Oh, I can get used to this," she purred lustfully, "And if I play my cards right, maybe I can be sent a second batch of that compound too…" Saving aside plans to get even more insanely massive, for now, Samus had a date with all this newfound beef she packed on, and she was going to savor it.
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