ultram0th - UltraM0th's TF Stories
UltraM0th's TF Stories

🔞Here's some stories and pics from around the Internet that involve TF, either made by others or myself. (If you see your work on here and would like it removed, please message me and I will do so immediately!) 🔞Asks/Requests are currently paused.

309 posts

Hey There I Was Wondering If You Could Help Me Out. I Always Been Too Lazy And Shy, I Was Wondering If

Hey there I was wondering if you could help me out. I always been too lazy and shy, I was wondering if you could help me be the confidant, driven, hardworking been in and outside of work, cocky man I’ve always wanted to be.

Shy and lazy? I feel that on such a personal level...

Luckily for you, I have just the trick. Go ahead and close your eyes, and we'll transport you somewhere...

You open up your eyes and are shocked at first to find yourself in the middle of a gym locker room, with a handful of naked musclemen standing around you. Their muscles glisten underneath the bright fluorescents of the locker room, making their musculature pop even more noticeably.

Before you can ask what's happening, you finally feel the immense weight on your entire body. You look down at yourself and hold back a loud gasp at the sheer expanse of muscle that you now possess.

Your body is now massive, looking like it should belong to a competitive bodybuilder. Everything about you was huge. Your arms were so large that they hung akimbo at your side, your biceps resting atop flaring lats. Your pecs were so heavy and cumbersome, feeling enormous and swole as they protruded far out in front of you. To act as a counterbalance, your glutes had expanded to a large degree, looking more like you were smuggling two soccer balls in your pants.

Your inspection was interrupted when you began to realize that the rest of the musclemen in the room were still staring at you, a hungry gaze int heir eyes.

On instinct, you felt yourself start to flex.

Without a thought on your side, you flexed your massive biceps, making the large muscle curl up with power, ellicitng cheers from the other men. You bounced your huge muscletits, letting the large mounds bounce up and down, jiggling with every movement.

You stayed there in the locker room, showing off your muscles for every guy who would look, a cocky smirk on your face the entire time. And you loved every second of it!

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More Posts from Ultram0th

1 year ago
This Stud's A Little Annoyed Because The Gym Employee At The Front Desk Told Him That If His Muscletits

This stud's a little annoyed because the gym employee at the front desk told him that if his muscletits get any bigger, he's going to have to wear a bra.

(Just something I did while trying to work on shadows)


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1 year ago
Don't Know How To Swim? Don't Worry! This Hot Daddy's Big Pecs Will Act As A Flotation Device. Just Hold

Don't know how to swim? Don't worry! This hot daddy's big pecs will act as a flotation device. Just hold on tightly!


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1 year ago

I am fond of you Derek turning into a more muscular and/or hairy guy if that's the kind of request you were looking for? Love your stuff though regardless it's hot and well done.

I Am Fond Of You Derek Turning Into A More Muscular And/or Hairy Guy If That's The Kind Of Request You

It all began the morning after Derek had assumed his new Alpha title. Stiles had slept over, cuddling up next to his boyfriend when he'd jolted up awake as soon as his hands had brushed up against something unfamiliar.

"What...?" he trailed off, his eyes wide at his boyfriend's chest that he usually used as a pillow.

"Hm?" Derek sleepily yawned, wondering what his smaller boyfriend was panicking about.

"Der," Stiles mused, "your chest. It's... really hairy."

The werewolf cocked his eyebrow up at his boyfriend, running a hand over his pecs. Sure enough, the werewolf's previously smooth chest was now covered with black hairs. They spread out over his pecs, running down across his stomach before connecting to his bush. The hairs curled and looked thick enough to where one might've guessed that Derek had always been rather hirsute. His pert nipples poked through the dusting of hairs, looking hard. Plus, Stiles hadn't noticed it initially, but Derek's square jaw was also covered by a thick beard that looked like it'd take weeks for a guy to grow... not just a few hours.

Derek's eyebrows knitted together as he ran his hands over his hairy chest, his heart starting to race. However, just as soon as the worry began to trickle in, it disappeared.

His face smoothed out and he yawned loudly, gently placing a hand on Stiles's head to pat it back down to his now hairy chest.

Stiles wanted to argue, confused over both his boyfriend's sudden change and different attitude. He knew that Derek should've been freaking out and wondering what was happening to him, but instead his boyfriend acted like everything was normal.

He tried to ignore it, but as Stiles rested his head back down onto Derek's chest, something about the way he had to crane his neck alerted the human to something else.

"Derek!" he gasped loudly, sitting back up and tearing the covers away from his boyfriend. "You're... bigger!"

His boyfriend had always had a pretty toned physique, but now it looked as if Derek's chiseled pecs were now significantly larger and much more plump than they should've been. Without the covers over him, Stiles could also see that it wasn't just Derek's chest that had grown larger. His boyfriend's arms seemed to have doubled in size, looking thick and powerful as he lied on the bed. Even his legs were larger, his quads pressing tightly together and shoving his bulge (which seemed to stretch out his underwear more than usual) out in front.

And of course, every single larger muscle was covered in dark, manly hair.

"Stiles," Derek groaned, going so far as to roll his eyes, "everything is fine. I feel fine, there's nothing to worry about--"

He was interrupted when his phone alarm beeped, letting him know that he had to get out of bed, making him frown.

With a groan, Derek rolled his hairy bulk out of bed, the frame squeaking much more than it usually did as he moved. His heavy footsteps thudded over towards the dresser. As he walked, Derek noted how odd it felt to have his thighs rolling over one another, and how awkward it was to have his muscular arms resting at a ninety degree angle atop his flaring lats.

Stiles watched in disbelief as Derek nonchalantly attempted to get dressed in his normal clothes.

"Damn," Derek growled as he examined himself in the mirror. With his new bulk, none of his clothes fit him anymore. He couldn't get any of his jeans up past his massive quads, having to throw on a large pair of sweats that used to be baggy on him. Now, the material was skintight, showing off his meaty glutes and enormous package in front. The t-shirt he'd grabbed barely wrapped around his torso, ending above his navel. It had torn significantly across his large muscletits, showing off the hairy cleavage that he now possessed. There were two large bumps on the front from where his larger, nubby nipples poked against the thin cotton.

Stiles watched as Derek paled in the mirror, his beard-framed mouth opening like he was about to voice his concerns, but again, Derek seemed to instantly relax. He shrugged his broadened shoulders.

"I think my clothes shrunk in the wash," he chuckled, gesturing down at his hairy muscles.

"Derek!" Stiles cried, throwing his hands up in the air. "It's not the wash, it's you! You've turned into a hairy bodybuilder!" As crazy (or crazier) as it seemed, Stiles could've sworn that he'd watched Derek's hairy pecs balloon out a few more inches in those few seconds.

Derek took one last look at himself in the mirror, seeing how large and imposing he looked with his incredibly large, round muscles and the thick, masculine hair that coated them. He couldn't help but smirk back at his shocked boyfriend, flexing a large, hairy bicep. As his massive muscle bulged to the size of a bowling ball, the tight sleeves of the t-shirt burst apart.

"I'm not a bodybuilder," Derek smiled at his boyfriend, giving him a playful wink. "I'm the Alpha."


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1 year ago
In An Attempt To Look Bigger, Bobby Decided To Shrink His Head. His Squeaky Voice Took Some Getting Used

In an attempt to look bigger, Bobby decided to shrink his head. His squeaky voice took some getting used to, but he loves how huge his muscles look.


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1 year ago

I think my roommate is hot af, but he's a straight jock bro. Can you help me turn him into a power bottom with a big butt?

I Think My Roommate Is Hot Af, But He's A Straight Jock Bro. Can You Help Me Turn Him Into A Power Bottom

You and your roommate, Evan, were waiting in the hot tub for your dates to finish getting ready inside. Two guys in a hot tub... yeah, only it didn't go that way, much to your dismay.

Although you had a date inside, you lusted heavily for your roommate next to you. Evan was a great guy, a nice roommate, easy to live with, and he was incredibly attractive. An avid athlete, he had an impressive muscular build, which was clad in tight, blue swim trunks.

However, Evan was straight, and you were strictly a top. Therefore, you weren't compatible, unfortunately. But you still longed for the straight stud.

And your date could tell, as he noticed that your eyes kept traveling to your roommate all night. Therefore, as he stepped out of the hot tub to "freshen up", he muttered a little incantation under his breath-- a nice surprise for you.

"When they get back," Evan told you, running through his game plan, "I need you to bring up the fact that I used to wrestle in college..." The handsome stud winced, his voice trailing off as he felt something off.

"Everything good?" you asked him, noting how Evan's handsome face paled.

"Y-yeah," he muttered, wiggling around in his seat.

Your eyes widened when he saw that he was rock hard for some reason, his impressive seven inches tenting out his trunks noticeably. Evan blushed furiously, his heart starting to race in his muscled chest, confused as to why he was hard in a hot tub with another man.

Then the changes started.

You noticed that the legs of his swim trunks slowly began to pull upwards, getting shorter and shorter by the second. The material suctioned to his body until it morphed into a skimpy pair of speedos. It was so small that the front pouch barely contained his hard cock and balls, and the back was fully engulfed by his cheeks.

"What the fuck?!" Evan balked as he stood up in shock, grabbing at his new speedo in shock. "What the fuck am I wearing?"

You were just as confused, but you also couldn't help but think that Evan looked really hot in such a slutty speedo. But then you noticed his firm butt shudder as it began to push out from his back.

Evan gasped loudly as his butt inflated, growing rounder and much more bigger than it should've been. The cheeks nearly tripled in size as they ballooned outwards, jiggling wildly from every subtle movement. Whereas Evan had looked perfectly proportional with his sexy muscles, he now was incredibly bottom heavy with such a big bubble butt that jutted out from his lower back, nearly forming a perfect shelf.

Before the stud could panic over his big butt, his large bulge shuddered before beginning to dwindle in size.

You watched as the pouch of your roommate's new speedos grew smaller and smaller, until it began to look loose and baggy.

"What the fuck happened to me?!" Evan cried as he tore his new speedo away from him, his meaty new cheeks jiggling as they were freed. He looked like he had two basketballs attached to his lower back. His own eyes went wide as saw his now two inch microdick.

Despite yourself, you couldn't help but feel so turned on by looking at your altered roommate. Sure Evan was hot before, but he was even more attractive with his big butt and tiny dick: the perfect bottom.

Immediately, your own cock hardened.

Evan's panicked eyes darted over to you and he intended to plea for help, but after noticing your six-and-a-half inches tenting your trunks, his little nub throbbed and he feel a foreign desire deep within his massive booty. His eyebrows scrunched together as he wrestled with his newfound lust, his little cock leaking a small bead of precum as he stared at your much larger cock.

"Do you want this?" you teased, gesturing down at your tented trunks.

Evan gulped, wordlessly nodding as he eagerly fished your cock out and impaled himself onto it.

Your eyes rolled to the back of your head as Evan immediately took over, somehow aware of how to expertly wiggle his hips and clench his cheeks to milk your cock. As he fucked himself on your cock, his meaty pecs bounced with his thrusts. The whole time, he moaned loudly like the buttslut he now was. The two of you locked eyes, having enough wherewithal to know that something had definitely happened, but not able to bring yourselves to even want to try to fix it.

You placed your hands on his hips, stopping his movements as you came, unleashing your load deep inside of your roommate. Evan's tiny, untouched cock spurted out an embarrassingly small amount of cum. The formerly straight stud blushed when it softened and receded even more into his bush, looking like a barely visible nub.

"Don't worry about that tiny thing," you reassured him. "You're big where it matters."

To emphasize your point, you playfully gave his rotund booty a little smack, loving how Evan shuddered at the contact.


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