Eric groaned as he sat up, shuddering as he felt the top of his massive musclegut rub against his sensitive nips. Immediately, he could feel a jolt in his loins and the musclegiant of a teen gripped at either end of the sofa, his meaty hands digging into the plush fabric. He didn't even realize just how inordinately wide he had to be to perform such a feat, all he knew was that just that little bit of stimulus was almost enough for him to start nutting all over himself again. Eric stood, grunting as he had to adjust his stance even wider than he did before his afternoon siesta. The giant stomped over to the full length mirror his mom used to check her outfit in before heading off for work.
Eric's bearded jaw dropped. His hands sprang up to touch his face, his huge biceps, even huger chest and lats all fought for space as his thick fingers ran through the hairs that had sprouted out of his cheeks and chin. He looked like a freaking college-aged mass monster. His gaze was drawn down his bull neck, his enormous traps flanking his head. He ran a his fingers though the dense forest of hair that carpeted his chest. Before, he could pass off as 'normal,' maybe a huge gym-rat powerlifter. But now, he was beyond anything he'd ever dreamed of. Muscle upon muscle greeted him in the mirror. His gargantuan pecs casted dark shadows over his huge gut. The big beast turned a little to the side and raised his arm above his head and marveled at the separation of his serrati. He broke out into a smile, sure he had a gut, hell, it looked like it too had gotten even bigger, but it was nice to see that there was a ton a muscle underneath that layer of fat.
He grinned as he let his arms rest at his side once again, the jacket looking almost pathetic on his hulking figure. The sleeves now only came halfway down his gargantuan arm, the biceps and triceps stretching the letterman to their limit. The collar was overly stretched out by his cannonball delts and back.
Eric was in awe at how huge he'd gotten. He tensed his right pec slowly, then his left. The hulking teenager giggled to himself as he began to bounce his heavy chest with earnest, feeling how each piece of mass pulled at his frame as they relaxed. Feeling a bit more adventurous, the musclebound bear tried copying a pose he'd seen bodybuilders and computer game characters do -- the most muscular, if he wasn't mistaken. He let his arms rest at his side, so overstuffed with muscle that the jacket wouldn't let him bring them any closer than 45 degrees to his body. Slowly, he brought his arms over as he leaned forward, tensing his immense chest, flaring his back and flexing his arms.
Eric was ready to give a snarl, bare his fangs at himself, prove that he was a beast on the inside as much as he was on the out! But instead, he let out a low, sonorous moan as his thick cock sprang up and slapped him hard in the gut, the red, tortured cockhead splatting gobs of pre-seed as it hit his furry belly just above his distended bellybutton. His hulking frame pushed against the now tiny confines of the jacket, his bull-thick shoulders causing the stitching along the yoke to fray ever so slightly. Eric had winced his eyes shut, but if he had them open, he would have seen the wisps of golden magic suffuse into the air as the fabric tore a little.
"Auugh!" the huge, hairy jock groaned as he hunched over, the power of the jacket taking over him. He might not have seen the magic, but he sure felt it. Normally, it would slowly seep into the wearer, turning them into an alpha jock over time. But, Eric had simply taken so well to the magic, his body drinking it in, that he'd already reached the intended limit. Only... he could take it so much further. The air was pregnant with the jacket's potent magic and it bound itself to the nearest host, the already overmuscled and overburdened teen hulk.
Eric shuddered as he felt his body explode in size. His arms caused the sleeves of the poor jacket to groan, the sleeves now stuck between the crook of his biceps and forearms. His chest looked like someone had stuffed melons underneath his hairy skin. Even with the jacket hanging on for dear life around his increasingly deific frame, his huge shoulders peeked through. Eric huffed and felt the power resonating within his huge, powerladen gut. He brought his hands down to hold onto it, shuddering as he felt his rough hands glide along the distended surface of his biggest 'asset.'
Well, maybe second biggest. Eric let loose a low grunt as his massive ass blew through the remains of his underwear, the cotton prison unable to contain the increased amount of ass, thigh and most impressively, Eric's plentiful junk. It had grown substantially before his wank session that knocked him out, and upon waking, it had taken the lion's share of the growth, easily surpassing double digits in measurements and Eric wasn't sure what side of a full foot of cock it was on. But now? Now that his body was erupting in masculine size and power, there was no doubt in his young mind that he was now the proud owner of the world's biggest cock. The young mega-stud bucked his hips, widening his stance as his bloated thighs took up even more space. His once tiny balls, each the size of grapes, had exploded into goose eggs, then oranges when he woke up. As the huge teen roared, easily double fisting his monstrous length, his rough fingers gliding along a rod that stretched them out that they could barely touch each other, his now mango sized cum-factories pulled up, the heavy sacs rolling up his titanic thighs, moving at least a couple inches, as they squirted their load, mixing with the copious amounts of fluid his testosterone-choked prostate was making, and blasting a river of semen all over the surface of the mirror. In mere seconds, the reflection of his godlike musclebull physique was smeared, all that he could see was tsunami of cum that was blasting out of his engorged cock.
After what felt like minutes, Eric was finally reduced to a trickle, a lazy river of seed oozed out of the tip of his bloated, reddened cockhead at least a foot and a half from the base of his crotch. He rubbed at his length tenderly, sighing with relief. But that sigh became a rumble as he felt his balls begin to pull at as crotch again, filling up with more precious life-giving sperm. His skin was moist with sweat, his pits and crotch giving off his powerful alpha-jock aroma, his scent marking the whole house as his.
God, his libido was endless. Eric huffed, realizing he needed to get this jacket off. Already, he was bigger than anyone else. Before this magic growth spurt, he could have passed off as some sort of offseason mass monster bodybuilder. But now, he was bigger than anyone of those guys he'd seen on TV or online!
Before he could attempt to take the jacket off, his phone goes off on the table. The lumbering musclefreak steps over to his phone to see...