"Let's go up to our room!" Ty said excitedly, his ten-inch dick getting hard in his shorts. He hustled Nate up the stairs to their shared room, and slammed the door shut behind them.
Nate backed up. He'd admired Ty in secret for some time--the sudden change in Ty's attitude was exciting and worrisome at the same time. Nate knew that Ty had a girlfriend, and that this change in orientation was due to Ty's just-revealed, bizarre magical power.
"Ty, I don't know about this..." Nate began.
Ty was having none of it. He pursued his roommate, quickly grabbing his shoulders, then gently pushing him against the wall, holding him in place. "Want you..." Ty purred, pressing his lips against Nate's.
"F-fuck..." Nate breathed between kisses, "But you... were straight!" he protested, even as he felt his control slipping. Having Ty up against him was really turning him on--one of his favorite fantasies, suddenly come true.
"Not anymore. Not going back," Ty replied, his tone unequivocal, "I want you bad, Nate! I'm so fucking horny for you!" Ty began to undress his roommate, pulling off Nate's shirt, admiring his lean, muscled torso.
Nate gave in. He began to kiss Ty back, giving in to his once-secret desire for his roommate. Ty and Nate both grinned at one another, and they became a swirl of arms and flying fabric as they pulled off their clothes. They fell onto Nate's bed together, limbs intertwined as they explored each other. "Want you too...so bad..." Nate groaned, feeling Ty's big dick rub against one of his muscular thighs.
Ty chuckled, and kissed Nate's neck. "Feeling's mutual, bud. Remember, I can be anything you want..."
"You're perfect," Nate replied, trying to reassure his roommate.
Ty wished he knew what Nate really wanted, and found that he suddenly understood his roommate's desires very well--better than Nate himself, possibly. And while it was true that Nate thought Ty was perfect as he was, Ty realized that he could be even more perfect, even more like Nate's ideal man. The stack of muscle magazines Nate had were more than just a source of workout tips, Ty realized.
"You're going to love this," Ty purred. He grabbed Nate's legs and pushed them up into position, guiding his dick between his roommate's cheeks. Then he pushed in, his entry eased by the lube he magically summoned. Nate still gasped though, eyes going wide as he was penetrated by ten inches of thick cock. Ty felt a shiver run through him, and his grin widened. He began to pump his dick back and forth, slowly working Nate's ass over with his big tool. Every time he pushed all the way in, his body added a pound of muscle. In short order it became obvious that Ty was growing!
"Wha-?" Nate gasped out, as he realized that the man fucking him was getting bigger and stronger before his very eyes. "Oh fuck! What are you--"
Ty stopped the question by leaning down and planting a rough kiss on Nate's mouth. Ty was rough and insistent with it, ramming his tongue between Nate's teeth, exploring his lover's mouth with it. He found Nate's tongue and wrestled with it, only pulling off when he was satisfied that Nate would be panting and overwhelmed. "You're gonna love this," Ty purred, his voice deeper than before, as he resumed his thrusts, his body beginning to grow again. He was visibly more muscular than before, and he smirked at Nate impishly. "When I'm done, you won't need those magazines to look at buff dudes--you'll have me!" he boasted, as he sped up the pace of his thrusts, his body's growth picking up speed as well. Nate lay back, gasping as he watched Ty grow into a larger and larger man, his thrusts getting more forceful as his muscles and strength grew.