Since he found out at high school how much girls crave his hot body and long dick, he devoted himself to fucking and working out daily. His alpha physique is taking its shape and he can't help but jerk off to his own reflection.
Jake stood there is disbelief as he heard the terms of what he had just agreed to.
Just seconds ago he was a scrawny guy who barely filled out his shirt and now it hugged his chest like it was a size too small. He had made a friend at the gym recently and invited him over for a bros games night. He's new friend said they should make it interesting and place bets on who'd win. Jake agreed even after his buddy said 900 pounds. He didn't know how the money conversion would effect how much money that really was but Jake believed in his gaming skills and so he agreed. It was only after his friend kicked his ass 20 - 0 that he learnt what he really bet on.
His new friend revealed that the loser didn't owe money but rather 900 pounds of pure muscle. Jake laughed at first before his suddenly filled out his clothes to the point they were tight and he looked like a natural bodybuilder. Pretty soon Jake heard the sound of tearing as his pants began to give way to his slowly expanding muscle. His new friend just laughed as he watched Jake slowly transforming into a muscled up freakshow...