
223 posts
Lives
Lives
“Rrrgghh yeahhh… I can’t believe it actually fucking worked!” Jonas bent his massive bulky body forwards slightly before flexing his giant new pecs and biceps with wonder. Showing them off with glee as he strained the tight wrestling spandex gear.

“What the fuck Jonas! What the hell did you do?!” Kyle, Jonas’ older brother, screamed upon dashing into the room only to find his little bro wearing his wrestling gear that’d gone missing about a week ago. Right now however he was more focused on the fact that his brother, who had been a chubby little smartass his whole life, was now a huge muscle beast! Meanwhile Kyle on the other hand, who had always been known as the sporty jock of the family, had suddenly shrunk down into a fat little shrimp version of himself!
Jonas smirked over at Kyle, looking down on his older brother for the first time in his life. “Well I was getting sick of the whole family always patting you on the back for being a meathead while I was always treated like an afterthought. So I looked into some magic shit online and it turned out all I needed was an article of your clothing and some magic lessons and presto! We switch lives.” Jonas explained before flexing again. “So now all those years you spent in the gym are mine along with everything else you’ve ever done! Everything you’ve achieved belongs to me!” He gloated while continuing to show off all the hard work Kyle had put into being huge.
Kyle was lost for words. What could he say? The man before him had literally stolen his life from him. He could tell it was still Jonas. After all his face was still the same only now it looked a little more chiselled and manly. But those arms? Those pecs? Those legs? They all belonged to him! Or at least the work that’d been put into them did. Meanwhile Kyle’s own clothes were hanging off his body. Before his Jonas hadn’t once stepped foot in a gym and now his body reflected that. Skinny arms with almost no muscle. A protruding little belly. A flat pancake of an ass. All of his gorgeous size and strength, stolen in an instant only to now be flaunted in front of his face. As if on cue, Jonas turned and gave his thick new jock butt a smack. Adoring how it jiggled.
“Better get used to calling me big bro from now on as well. Pretty sure our ages have swapped as well.” Jonas added, the more mature look his face now adorned suddenly made more sense as he’d aged up from 20 to 24 while Kyle had undergone the opposite.
That was it. Kyle snapped out of his daze and lunged at bigger man. Attacking him in a blind rage for what he’d done. Unfortunately, with Jonas’ new size and power, it wasn’t long before he’d easily subdued Kyle with a headlock. No matter how much Kyle wriggled and writhed he just couldn’t free himself from the grip Jonas’ giant bicep had on him as he was held underneath Jonas’ pit.
“Alright you little bitch, this is how things are gonna go from now on.” Jonas sneered down at his now younger brother struggling in his grasp. “For a start I’m the big meathead jock that dad is most proud of. Not you. Second, you’re going to act like this is all normal. Like you’ve always been a pathetic weak little bitch. And third, you’re gonna do whatever the fuck I tell you. Otherwise I’ll use some more of the magic I learned to turn you into a new wrestling singlet for me. Got it?” Jonas stated, clearly enjoying his new power far too much.
“…”
“Got it!?” Jonas repeated, squeezing Kyle a little tighter in the process.
“Y…yes. I got it…” Kyle finally replied, sounding completely and utterly defeated. He then let out a gasp as Jonas finally let him go.
The new jock smirked. “Now then, to help you get settled in, how’s about you worship me?” Jonas quirked an eyebrow before raising his arms up again and flexing them. Simply intoxicated with how they bulged with so much power.

Of course Kyle didn’t want to oblige. At this point he wanted to run away if anything but he was too scared that his brother might actually follow through with the threat he made. Instead Kyle took a deep breath before stepping forwards, a look of dejection crossing his face as he did exactly what Jonas told him too as much as he hated it…
“Mmmmm yeah that’s right… grope my muscles bitch! Fuuuuuck…” Jonas groaned as Kyle did exactly that. Running his hands over what should’ve been his pecs and squeezing them as per Jonas’ request. Tracing the bulging muscle of his biceps. Admiring the sheer magnitude of his shoulders. He hated it so much… which was exactly why he was so damn confused when he found himself getting a boner. Not that he was only one. Jonas had been sporting the largest tent every since casting that spell, pressing crudely against the tight spandex it was constrained by. Though it seemed Jonas was enjoying this muscle worship a little bit more than Kyle had realised until… “Ugh yeah! I’m gonna…” He didn’t even get a chance to finish his sentence as moments later globs of thick cum seeped straight through the fabric of the singlet before falling with heavy drips to the floor.
Kyle found himself both disgusted and turned on at the same time. Was this going to be his life from now on? Forced to not only worship his asshole of a brother that stole everything from him but also forced to kinda enjoy it? His life was going to be torture…
“Now get on your hands and knees and clean that up.” Jonas ordered and Kyle did exactly as he was told.

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More Posts from Thefty-o
Drink from A Stranger

My vision suddenly got blurry as soon as I spent the drink this stranger treated me, which is weird because I have high tolerance and the drink is not even that strong. The whole world around me seems spinning continuously as this huge man in his tight clothes said things that I can’t comprehend clearly. I only heard some words like “woozy”, “drained” and “good source of” as my headache grew stronger until I passed out.
The next morning I wake up in the bathroom floor, shirtless and somehow feeling so sick. Then I realize the shit that happened to my body, I LOST HELL A TON OF MY MUSCLE! And what the fuck with this stupid long hair with bang? I take a look in the mirror to confirm my fear and it’s confirmed right away that somehow I lost almost 15 years of my age or somewhere around that number and also my muscle drained drastically.

I slammed the bathroom door and shocked to see the guy that I met last night posing in front of the mirror
“How’s the hangover? Told you, you’re one hell of a good source of protein,” he said while staring at me with his cold stare, his arm and biceps tensed as he tightened his grip to the towel that he must be use to wipe off his sweat

“What did you do to me last night, asshole?”
“Well, only a simple trick of muscle draining. I know you’re hungry, what about if I replace the lost protein with something more tempting?” he said while suddenly drop his pants to the floor, revealing a thick 7” cock
I’m straight but I don’t know, like there’s some sort of energy or something that make me afraid to him, yet at the same time turned on too. I can only drool to such sight and then once again he smirked
“I knew you’re a fag,” and he sauntered me to force me kneel to the floor and suck his thick cock
Everyone seemingly oblivious to the change as they keep talking and drowning themselves in their business but I really need to break free from whatever shit he put me into. He transferred more and more of my muscle and I believe some traits within me as he seemingly want to reverse our role. I tried to scream for help but that intense gaze locked me as I can only watch him swell to fit his clothes that used to be mine while I used the clothes that he used previously.......

Resizing
Similar stories and bonus material on my Patreon.

"Care to make it more interesting?" the guy said. We were both about the same age, size, and build. Me, a ginger electronics engineer student dedicated to exercise for years, and recently getting serious with bodybuilding, and he, a Latino who obviously didn't skip gym or his meal plan too often. I guess that was why he'd asked me to spot for him at the barbell. He returned the favor and I felt the need to use the same weight as him and do his reps plus one. That led into testosterone fueled adventure hunt through the gym where we one-upped each other on various equipment and exercises. No one else was in there at this hour. Very mature behavior conducive to optimal results, not. We'd likely regret this the rest of the week.
"Interesting how?" We were standing under the pull-up bars.
"Most pull-ups win muscle and size."
"Isn't that always the prize?" I asked.
"I suppose it is. Chin must come above the bar and then the head fully below it for it to count. Are you in?" He held out his hand. I shook it.
"I'm game," and took a small jump up to the bar and started without any hesitation. I could feel fatigue from what we had done previously, but I tuned it out best as I could. He was counting. I came past eight pretty smoothly, but then I started to struggle. I would have hoped to at least would be past twelve by that point. By thirteen I had to really push it to get number fourteen above the bar, but then I had to give up. I felt a bit disappointed, as I normally can go past fifteen, but he should be just as tired as I.
"Strong going," he congratulated and slapped my shoulder. Then he leaped to the bar, also trying to show off, and began. While it didn't look easy for him, I couldn't see him struggling too bad either, rhythmically going up and down, perhaps slowly getting closer to the agreed limit above the bar. "Ten. Eleven. Twelve." His pace didn't falter. "Thirteen. Fourteen." He made a little smirk. "Fifteen. Sixteen. Seventeen." That last one wasn't perhaps a legal pull-up, but I had already lost. Perhaps he felt it too, so he dropped down to the floor.
"Fuck, I'm tired," he said, no need to pretend anymore. "Well, at least I won. I shall claim my prize," and he grabbed my hand again. Suddenly I was in agony. It felt like the dull day-after-soreness after a particularly grueling gym session, but there was more to it. It felt like I couldn't move anymore, at least not much. I wasn't frozen in place, but my body refused to detach from him, refused from stepping away. I was hot. I could feel droplets of sweat running down my body, and my eyes were watering up, making the entire room hard to see. But I could see that everything was somehow shifting.
Once he let go I felt unsteady, my body still in flames and sore as hell. His face however wasn't in front of me anymore. Instead I stared right into his chest. I looked down at my body. Years worth of work was gone. It was still an athletic body, but all definition in arms and legs were gone. Pecs and shoulders like any track and field student. "What the hell did you do!" I shouted.
"Muscle and size," he said calmly and flexed his now much larger arm. He looked down at me. "Don't worry. Girls like short boys with abs. Boys too I guess."
"Fuck you! Turn me back!"
"Or what? You're going to tell someone a guy you don't know stole your height at the gym?"
He had a point there. If I hadn't just seen it happen it would be completely unbelievable to me too.
"Just be the bigger man," he said and walked towards the showers.
Mikey couldn’t believe it was working. That old spell book in his grandfather’s chest was for real. Holding Saul’s hand, he could feel a strange energy fill his body.
“Holy shit lil’ dude” the older boy exclaimed. “Look at you!”
Mike glanced to the side where he had his mirror and look at his reflection in shock. He was rapidly growing, almost reaching Saul’s height as a senior. His shirt felt increasingly constrictive as his arms bulged, chest muscles began to push the fabric, back widened. Take off the glasses and ditch the button-up and he could pass as part of the swimming team, or maybe the soccer team...
“Wow...” was all he could muster in his new, slightly huskier voice.
“Bro...” Saul nudged him, but the boy was too enraptured in his marvelous growth to notice the older boy begin to dwindle in height and lose much of his size.
“Bro! I think you’re good for now! Let go!” Saul called louder this time, using his free arm to pull off Mikey’s hand from his own.
“Oh!” Mikey exclaimed as he came to himself. “I’m sorry! I was so...” he began to mutter as his eyes went back to the mirror and his improved form “-amazed...” he concluded as he tried to move around in his too-small clothes.
“Yeah... I noticed...” Saul commented in an annoyed tone as he lifted his arms to see how baggy his shirt was now. He silently appreciated the belt holding up his shorts. “Anymore and I’d come out of this looking like a middle schooler... “
Mikey looked at his friend, noticing how they practically saw eye to eye now, but the bulk and size the eighteen-year-old had before were gone. He’d still pass for a senior, maybe a junior, but a more average looking one now.
He smirked. “Nah! You’re still a big boy.” He playfully patted him on the shoulder. “Besides, you’d probably be a cute middle schooler anyway.” He commented.
“Don’t get any ideas, Mikey!” He pointed at Mike. “Don’t make me regret this!”
Mikey nodded. “Don’t worry! I promise I won’t.” He hugged his friend, feeling the new power in his arms. If he wanted, he thought, he could hold Saul like that with minimal effort. It felt good. During his strong hug he could swear he felt a poke against his leg, but as he let go, he could see nothing out of the ordinary, aside from what could be a slight blush on Saul’s heavy tanned skin.
“Thank you! I mean it!” Mikey said. “I just need to stop being kicked around by Hank and his imbecile posse. And now,” he attempted to flex a bicep, but stopping as soon as he started hearing a tear in the fabric “I can! And all thanks to you.”
“Yeah yeah! I know I’m awesome!” Saul waved. “Just give me back my...” he looked up and down to the burgeoning athlete in dork clothes “you know, everything, next week. That should be enough...”
“Don’t worry.” Mike said with a wink. “I’ll put your... everything to good use!”
--
Saul left soon after and Mikey thanked the heavens. He couldn’t stand in these terribly tight clothes anymore! His shirt, his socks, but more urgent yet, his underwear.
Taking off his button shirt with effort, Mikey was in awe of his new sculpted pecs protruding from his chest, he caressed them and followed down to an immaculate row of abs connecting to his waist. He pulled off the trousers, that now looked like they were close to tearing at the seams. His legs were wide and powerful. His feet looked bigger, even. And gazing up he stopped at his poor white briefs, pushing and compressing an impressive bulge.
“Wow...” He moaned. “I guess I got some of Saul’s ‘other’ size too...” He thought as he pulled down the last piece of constrictive clothes. A long, girthy semi erect dick whipped out of the small nerdy briefs. “I must be, like... 7 inches now!” Mikey said, grabbing his newly improved fuckstick. It felt heavy in his hand, being accustomed to his 4 incher. “Poor Saul.” He thought, making a note to return him his size as soon as he could.
“But for now...” He smirked and flexed his huge biceps. His dick twitched at the sight. “I want to enjoy the ride.”
--
Saul was getting restless. The week was almost over and not a word for his neighbor. Mikey was always a good kid, and he was tired of hearing how he was constantly getting bullied by some idiot jocks...
He looked at his mirror. He missed his muscles and the size he used to carry, but he couldn’t help thinking how he kinda looked cuter with a bit less meat in his bones, more of an average but still charming high school boy. He felt a tingle in his lower area, making him rethink all of that. If he knew Mikey’s weird spell would also drain away his size down there, he’d probably reconsider being a donor. Even in his boxers, there was hardly any bump in the front. His healthy looking 6 incher, now closer to 4, at most...
Suddenly there was a strong knock at the door.
Mikey! It had to be him!
Saul flew down the stairs, only in a baggy t-shirt and boxers. He wasn’t prepared for who was waiting on the other side of the door.
A hulking muscular beast walked in. “Hey there little dude.” He said in a deep voice as he looked down at Saul. “Did you get smaller since I last see you?”
“Mikey?” Saul asked incredulous. This muscle god was at least 7 feet tall by now, his massive chest barely covered by a tank top, strong thick arms stretched behind his head exposing a pair of sweaty and moderately hairy pits. The monster smirked at Saul, and it was clear it was his friend’s face. More masculine, more defined, perfect skin instead of the normal zits, a killer smile...
“I go by Mike now. Mikey was giving people the impression I was some tiny nerd or something.” He brings one of his arms down and casually adjusts his crotch. “And there’s nothing tiny here, right?” He laughs.
Saul could see the outline of the massive snake in his underwear, easily spotted in all its thick glory even through the sweatpants Mike was wearing.
“What...what happened? You were like...not half as big last week.” Saul asked the giant teen boy.
“Well, it was all thanks to you, buddy!” He said as he walked towards Saul and grabbed him in a strong hug. Saul’s head resting against the boy’s giant pec. He suddenly felt inundated by the smell coming from his arms. Saul’s head started swimming and a tingle made his dick twitch.
“You should’ve seen Hank’s face!” Mike laughed and let go of Saul, walking towards the living room and sitting in the sofa, legs wide apart. “When he saw I was as tall as him and was like, as jacked as him, I think he shat his pants. For the first day in my high school life, they left me alone. I couldn’t believe it was that easy!”
“That’s great! But then-” Saul tried to speak.
“I wasn’t done speaking, bro.” Mike interrupted, in a calm, but authoritative way. His voice caused a tingle to spread down Saul’s spine and into his lower area.
“Well, you won’t believe what those pussies tried next!” He continued, now in a friendlier tone. Saul, however, couldn’t shake off the force the boy exuded and the respect he commanded with a simple sentence. He stood in front of the huge teen as he stretched on the couch.
“They waited for me outside the school the next day. Waited for me to be alone and then Hank grabbed me and dragged me to old warehouse. I guess he thought he couldn’t put me in my place alone now, so he wanted to gang up on me where no one could see. Can you imagine though? How could those losers ever think my place was beneath them?” He laughed at the notion.
“And wasn’t he surprised when he noticed my shoulders were too wide for him to grab me like that. And weren’t his friends shocked when he let go of me and was just a skinny brat. You should’ve seen his face. Wait. You can actually see it. I took pictures.” Mike said, picking his phone from his pocket. Turning the screen to Saul, the awe-struck boy could see a kid looking no older than 12, swimming in his oversized clothes, looking up in shock.
“Glad I remembered grandad’s spell, eh?” He winked at Saul, who nodded, not wanting to interrupt his friend again.
“Well, after the brat was taken care of, his friends were easy pickings, to be honest. With every bit of muscle I took, I took ability, masculinity, everything that made them jocks. They had nowhere to run, and I took it all.” He laughed.
“So, what do you think lil’ bro?” Mike smirked at Saul as he flexed his gigantic biceps.
Saul dry swallowed. What did he think. Right in front of him was the biggest 15-year-old in the world, most likely. He exuded power and masculinity. He fumbled for words. He felt butterflies in his stomach and the tingling in his dick was stronger than ever. Not just his dick, either. He felt a yearning, inside...
“Mike-” he almost used his old nickname. “That’s insane. You’re like, bodybuilder huge!”
“I know, right? Pretty sick!” He guffawed. “Didn’t feel the need to drain them as much as Hanky boy, but they’re pretty much nobodies now. Horny submissive nobodies, actually.” Saul was shook. “They can’t seem to quit my dick, now.”
“But then again.” Mike grabbed a handful of cock “I got about four jocks worth of testosterone and musk so...” He looked suggestively at Saul “who would be able to...”
Saul tried to repress the growing feeling inside him. “But your folks? I live right next door and saw nothing different. No one was surprised about this much growth?” He tried to change the subject.
“Oh that!” Mike waved. “Another one of grandad’s spells. Basically, it normalized things. If you’re outside the spell, that’s how things always were. Kids at school all think that this is how I always looked. Well except for Hanky boy and the bottom bunch. Even if they wanted to tell someone what happened no one would believe them. I think they like knowing their muscles made me this huge, and if they don’t, they should. But yeah, since you were outside that spell it probably, sorta normalized things for you too...”
Saul just nodded. It made sense. Even though his head was spinning from all this information and the increasing muskiness in the room.
“So yeah. It’s all thanks to you, lil’ buddy!” Mike reached in front and grabbed Saul until the smaller 18-year-old was straddling his huge quad. Mike’s strong arms surrounded the boy and hugged him tightly. Saul couldn’t help himself but sitting on his friend's leg and putting his hands on his muscular body.
“I came over to honor my end of the deal. Give you back your muscle. Your height. A few inches down there...” he chuckled. “Unless you don’t want me to.”
Saul looked shockingly into his friend’s eyes, still holding to his pecs and shoulders. How could he think that was the case. For an entire week he’s been forced to live without his hard-earned physique. It’s not like it’s that bad, and he had to admit he fit real comfortably on Mike’s lap like that, but still...
“Unless you want me to keep them. Keep looking like this.” He spoke softly, in a voice that twisted his thoughts.
“I think that’s what you want.” He chuckled softly; poking Saul’s modest but raging boner. A large wet spot already had formed on the front of his boxers. “And if that’s the case, I’m sure I can pay you back some other way.” Mike’s big meaty hand slid down Saul’s slender back until it found his supple ass. Saul yelped as the hand caressed his backside. “I’ll make sure to give it all to you. Again, and again...” He whispered at his ear.
“But you have to be the one to say so.” He continued. “So, what will it be?”
Saul still looked at his friend’s eyes, his hands wandered freely on Mike’s massive chest. He couldn’t think straight, and the yearning inside grew and grew until he finally admitted to himself what it really was.
He wanted this muscle god inside him. He knew he’d gladly give all his muscle, all his masculinity, just to be owned by this perfect specimen. No matter how many others there were; to know he was Mike’s. To be used as he saw fit. Saul could only hope he was able to give more to this example of athletic perfection. More of his height, so he’d be smaller, and Mike could manhandle him with even more ease, more of his dick and balls, now useless for Mike’s intended purpose, so he could add more to the python and orange sized balls his former nerd friend now had.
And as he imagined that and he became even more hungry for cock, Saul felt himself sink deeper, fit even more snugly in Mike’s embrace. He could feel the teenage titan stretch a bit more; his spine extend a couple more inches; his frame swell with some more pounds of muscle...
Saul looked up at Mike and approached his mouth to his, still afraid to make any noise, and meekly nodded. After all, the choice was obvious.

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Well this has been my first "longer" story and the first experiment in making stories without a picture for inspiration and instead drawing random themes from a choice wheel. This time the themes were Muscle Theft and Corruption ;)
The AI picture is just meant as a placeholder for now, as I haven't found a appropriate picture for it ( and I know you pervs prefer TF stories with pictures). I invite people to submit pictures to accompany this story. And finally, if you have suggestions of other places I could post my longer stories from now on, please let me know!!