Subject #3

by MuscleNexus   

A brief scene involving a young man named Cody transforming into the subject of a muscle growth experiment.

“Drip.”

“Drip.”

“Drip.”

Cody grimaced as a he felt a cool liquid running down his face. He groaned. He felt like he was waking up with the worst hangover of his young life.

“Urgh.” He propped himself up, rubbed his eyes, and took in his surroundings. “What the fuck.” He wasn’t in his warm bed nor was he in his little studio apartment.

“Drip.”

Cody looked up to see the steady rain of water droplets escaping from a crack in the ceiling. It looked like he was in some sort of warehouse, or abandoned mall. And it was flooded. Everything had a fresh layer of moisture on it and the air was cool with the feeling and scent of fresh rain. He peeled his shirt off his skinny frame, it was soaked through. The rest of his clothes were too.

He noticed the gloves on his hands and suddenly remembered what he was doing. He had been biking to work, but decided at the last minute to take a slightly different route. A route that forced him to past the long-abandoned shopping mall.

Cody slid to his feet. He needed to find a way out. He spun side to side, looking for any hope of an exit. Finding none he walked to the railing and looked into the lower level of the abandoned mall. The entire first floor was flooded almost all the way to the second. Perhaps there was an emergency exit down there he could try…

Cody took a deep breath, ready to dive in, when a tinny electronic voice crackled through the empty halls of the mall.

“Subject number three. Observation beginning at 10:33 a.m. Investigational product nineteen administered at 10:05. Primary therapeutic effect expected in two minutes. Standby.”

“What?” Cody croaked, instinctively rubbing a sore spot on his delt where there was a small drop of blood and pinprick. “Hey! Heeeeey! Hello!” Cody called. “I’m not some kind of science experiment! What’s going on.”

Cody nodded with satisfaction as the loudspeaker crackled into life again, at least he would get some answers.

“Subject three, you are an experiment. Investigational product initiation expected in twenty-five seconds.”

Cody swallowed hard. His throat felt swollen and tender, he placed a hand up to it and felt the barely perceptible thickening of the muscles and cords that ran it’s length. He groaned deeply as his whole body suddenly felt hot and heavy.

“What.. Is… This…?” Every word sounded slightly deeper than the last.

Somewhere in the back of his mind Cody began to feel pleasure mixing with his fear. He glanced at his expanding forearm as thick veins bulged across it and cried out a little. “No, no, no!” It was suddenly clear what was happening. “I don’t want this! I don’t want to be big!” He called out in desperation to nobody in the empty mall. His groans increased in desperation and pleasure as the man that was Cody became Subject #3.

At the bottom of his vision he saw his chest heavy with every breath, growing into thick slabs of muscle that hardened and jumped with even the tiniest movements of his arm. Below each sagging pec his belly swelled with muscle. He rubbed the fine hairs that dusted his turtle-shell like abs, not expecting to feel the jolt of pleasure that giving himself muscle belly rubs brought.

His attention was suddenly brought to his lower half as he heard the fabric in his lycra biking shorts straining and ripping. Loose only moments ago they showed serious signs of strain against his rapidly swelling thighs, ass, and package. Cody groaned and grabbed the latter of these through the tight fabric. He lost himself for a moment, feeling the thickening meat in his shorts, but then regained clarity when an audible moan escaped his lips.

“No. Not… Me.” He managed to growl before yanking his hand back. He staggered back a little, noticing the heavy thuds that his overgrown calves and feet made against the floor. He groaned again involuntarily as he realized how massive he had become and was becoming. Cody would’ve hated the overgrown mass monster standing in the abandoned mall, but subject #3 had different opinions.

With a small gasp of defeat Cody looked himself over. He knew he would never be able to return to his life as the clean cut professional that had been biking to work only half an hour ago.

“I freak,” he managed to croak.

Subject #3 let his hand return to the throbbing meat in his shorts and never thought of Cody again.

For a version of this story with a 3D illustration please take a look at my Patreon: https://www.patreon.com/MuscleNexus

Vote on this story

The salt: the lab assistant by RdyRoger Helping out at the lab where a scientist is developing very effective body enhancement formulas can expose you to temptations too tough to resist. 9,042 words Added Jun 2010 25k views 5.0 stars (8 votes) No comments yet •Cock Growth•Huge Balls•Huge Cock•Hyper Cum•Other Mental Changes•Muscle Growth•Muscle/Strength•Increased Libido•Getting Handsomer•Voice Deepening•Plausible Size Difference•Size Increase•Hair Growth/Getting Hairy•Nonconsensual change •M/M

The Gallus Legion by Hymond Blake After a brutal war, Emperor Incretius has taken control of the Halatuan Empire, thanks to his army of giants and a unique and powerful ability to transform people. Tylus is a servant to the Emperor and is a potential threat to Incretius’s new rule. He must navigate the political trappings of a wartorn empire whilst surviving the unforgiving world inside the Emperor’s palace. 4 parts 13k words Added Dec 2024 Updated 8 Mar 2025 8,701 views 5.0 stars (5 votes) No comments yet •Cock Growth•Ball Growth•Hyper Cock•Cum inflation•Public Orgasm•Muscle Breast•Muscle Growth•Muscle/Strength•Increased Libido•Getting Handsomer•Transformation•Voice Deepening•Getting Taller•Giants•Forced Growth•Size Increase•Age Regression•Nonconsensual change•Ancient Era •M•M/M•M/M/M

Resolutions by BRK Ray intercepts a seemingly magical book of fill-in-the-blank New Year’s resolutions his boss, Danny, had ordered, and starts making plans for improving Danny’s too-boring sex life. 13 parts 71k words (#52) Added Jan 2021 Updated 12 Feb 2022 48k views 4.9 stars (37 votes) No comments yet •Cock Growth•Huge Balls•Huge Cock•Self-suck•Hyper Cum•Other Mental Changes•Hyper Muscle•Muscle Growth•Muscle/Strength•Increased Libido•Size Decrease•Size Increase•Tongue Growth•Retcon•Suggestion•Nonconsensual change•New Year’s Eve•Complete •M•M/M•M/M/M•M/M/M/...

Orientation by Cris Kane After a welcoming party, freshman roommates discover that life is different at college—and so are they. 4 parts 20k words Added Apr 2019 27k views 4.8 stars (13 votes) No comments yet •Cock Growth•Huge Cock•Gender Swap•Other Mental Changes•Muscle Growth•Muscle/Strength•Getting Handsomer•Transformation•Voice Deepening•Size Decrease•Size Increase•Age Regression•Nonconsensual change •M/M

Critical mass by UberPump Bryan is just a High School Senior, ready to get his miserable life over with at this wretched place. No one seems to notice the small, scrawny 5-foot-3 teen, with the exception of the school bully. Albert teases Bryan all the time, his goons joining in. After school, Bryan stumbles upon one of his dad’s latest creations at his Bio Medical Research facility ande decides to take the mysterious serum in hopes of one-upping Albert. Bryan’s life, and body, changes forever. But there are side effects that none of them foreseen... 5,082 words Added Feb 2024 21k views 4.8 stars (26 votes) No comments yet •Cock Growth•Cock Pumping•Huge Balls•Ball Growth•Huge Cock•Cum inflation•Hyper Cum•Public Orgasm•Muscle Growth•Muscle/Strength•Muscle Worship•Man Scent•Increased Libido•Foot Growth•Voice Deepening•Getting Taller•Forced Growth•Size Increase•Inflation•Father/Son•Bisexual•Humiliation•Nonconsensual change•Gross Bodily Fluids •M/M•t/t/t

The Benefactor by Proteus The Benefactor bestows favor on those he deems worthy, whether they like it or not. 21 parts 21k words Added Jan 2020 Updated 12 Apr 2025 54k views 4.8 stars (30 votes) No comments yet •Always Hard•Cock Growth•Huge Balls•Huge Cock•Immobility•Muscle Growth•Muscle Gut•Muscle/Strength•Getting Taller•Plausible Size Difference•Size Increase•Nonconsensual change•Supernatural •M/M

Bottom mega-alfa by Jerkoffcentral Lit prof Jonas has been lusting after the exceptionally muscular students on his prep school survival outing, but even more after the massive gym teacher Noah, who’s so alpha he has trouble controlling just how massive he is—especially when he’s aroused by an admirer’s obsessive lust. 8 parts 22k words Added Nov 2014 Updated 22 Dec 2017 82k views 4.7 stars (63 votes) No comments yet •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Size Increase•Hair Growth/Getting Hairy•Dom/Sub•Nonconsensual change•Werewolves •M/M

Keith the new guy by BRK New hire Keith readies himself for his first-day meetings with his new boss, but the twink receptionist is kind of distracting—and why does his shirt feel tight all of a sudden? 2 parts 5,525 words Added Aug 2021 Updated 22 Jun 2024 17k views 4.7 stars (11 votes) No comments yet •Cock Growth•Huge Cock•Multicock•Multihead•Boytaur•Four Legs•Multiarm•Multileg•Multilimb•Three Legs•Multipec•Multitongue•Stacking•Muscle Growth•Muscle/Strength•Getting Handsomer•Getting Taller•Plausible Size Difference•Size Decrease•Size Increase•Nonconsensual change •M/M•M/M/M