"A speedo, huh?" Jim says, examining the piece of cloth in the pile of dirty clothes. Jim did always want to be a swimmer, though his weak and nerdy physique kept him from trying. He looks around in the locker room and notices no one else around. Wanting to at least pretend to be a swim jock, he decides to try it on.
He throws his backpack onto the ground and lifts his hoodie and t-shirt over himself. He'd never done something as crazy as trying on jocks' clothes in the locker room. If the swimmers saw him they'd give him a beating for sure. "I better hurry," Jim thought as he kicked off his shoes and rolled off his socks, carefully setting his clothes on the bench behind him. He removes his wallet and unhooks his belt, removing his jeans and setting them on the bench with his other clothes. Unfurling the speedo, he examines his scrawny body and sighs in sadness at his lack of muscle and physique. "Well, since I'm never going to be buff, I mine as well fantasize while I'm here." Jim's briefs are almost a kid's size, and he looks down at his barely noticeable package and tiny pecker. "If only I could be more fit, more muscle, more power..."
Jim slides his briefs down his slightly hairy legs and kicks them onto the bench. Though he'd gone through puberty by now, his masculinity was slow and immature, with barely any hair over his legs and his small package cramped behind his stick-like legs. "Fuck me," he says, almost ashamed of himself. He slides the speedo through his feet and slowly runs them up his legs. As he does so, slowly pulling them over his ankles and shins, he notices a tingling sensation resonating from the cloth. "Interesting" he thinks to himself, "these things feel kind of good." As he raises them over his knees he notices a bright, but soft blue electric current from the speedo and onto his body. "Woah!" he thinks. "These things feel great, what the fuck are they doing to me?" Excited by the prospect of the speedos, he wonders if they could be power ridden. "Could they transform me into an olympic swimmer?" he thinks to himself.
Hurrying to get them on, Jim stops at his quads as he hears some swimmer jocks enter the locker room. "Oh fuck" he says, "they're going to catch me" and he quickly runs the speedo up to it's rightful place, pulling it over his package before moving his hands to his behind and lifting them over his small butt.
Jim walks silently over to the other side of the locker room as he hears three jocks round the corner and look at his pile of clothes on the bench. "Is anyone else here," one of the jocks asks. He looks to his buddy, "practice isn't for another 30 minutes, who else would be here?"
Jim thinks he's safe as he looks down at the speedo. It starts resonating on his skin, over his package and ass. The blue electric bolts start to grow as he feels a power rumbling inside it. "What the fuck?!" he whispers out of surprise and excitement.
"ARGH!" Jim shouts as his growing package pushes against the cloth. "Whoa!" again he shouts, feeling the power of the speedo spread up and to his abs. Looking down he sees his shrimp-like stomach contort and grow as six well-defined and muscular abs shape and grow out of his body. "Oh yea!" he says again, feeling the muscle grow around his back and up to his pecs, growing out like rocks of steel.
"Who is that?" the lead jock asked as he rounds the corner. Looking over he sees Jim, formerly the shrimp of the school, growing into a muscular monster right before his eyes. "Holy shit!" the jock says, "what the fuck is going on?!"
Jim is admiring his body as his arms bulk up, biceps growing to the size of a rugby players. "Oh yea," he says again, looking up at the jock, "holy shit," he shouts, smiling at the jock, "i'm fucking grooowwwwinggg!"
Jim's quads snap into place as large footballs grow underneath them. Hair grows onto his legs and up underneath the speedo as hair grows over his abs and onto his chest. His package continues to stretch the speedo as the newly formed power-jock revels in his new strength. "I'm growing!" he shouts punching his newly muscular arm against the locker. More electric bolts exude from the speedo as his ass locks in and grows out to a muscular hard bubble, bolts growing out of the speedo and gracing his body with supernatural powers.
Jim begins to feel the knowledge of the powers he gains: transformation, manipulation, strength, invisibility, immortality, possession, mind reading and control. He laughs as his vocal cords stretch and deepen, becoming the swim-god he always wished he would be. Violent powers of electricity cover his body as the last of his transformation completes, spellbinding the three jocks who can't look away at the incredible and fearing transformation happening before them.
The powers seep into Jim as the newly formed super power jock takes in the transformation that just occurred. Examining his body he looks up and smiles at the jocks. "What do you think of me now?" he asks, laughing.
The jocks can't look away. On the one hand, they're in total surprise that the shrimp they used to pick on in the cafeteria has grown into this muscle-ridden god, 2-3 times more powerful than they could ever be. But on the other hand, they can't help but look away at the seemingly supernatural, beautiful specimen before them. He was more than human.
Jim could sense the jock's admiration and he smiles at them. His body, snug within the speedo, he feels himself now a part of the power-ridden cloth. It has become him and he has become it. Wanting to show off and examine himself in his natural state, he takes a breath and orders the cloth to soak into his body. Looking down, the jocks notice the speedo rumble, liquify and soak into the body underneath it, fabric seemingly disappearing into the body it wrapped around, as a magnificent naked specimen exposed itself in all its nude beauty.
Jim looks down at his exposed body in all its glory before looking up at the jocks. "Let's have some fun," he says.