Coach felt the hot cum shoot up his ass, fully finishing off Aaron's transition into manhood. Aaron groaned loudly as he continued to thrust his massive cock in Coach's hole until his cumshots finally subsided. Coach rolled over to face Aaron, getting his first good look at his former student since he had gone through his changes.
There was no trace of the scrawny teenager remaining, being replaced by a hairy beast of a man. Aaron now looked as if he was in his mid-forties with a killer body. Aaron looked similar to Ryerson, as if he could be his older brother, but with a hairier and more muscular body. Ryerson actually felt a pang of jealously as he stared in lust at Aaron's tight, firm pecs and washboard abs that were hiding beneath a thick treasure trail of dark brown hair. Aaron's cock was even a few inches longer than Ryerson's, still rock hard as Aaron slowly stroked it.
"Come clean me up," Aaron commanded.
Coach Ryerson laughed, shaking his head defiantly. "I think you forget how this works. You still answer to me, Aaron. Which means that if you don't obey me, I can change you back."
"I said come clean me up, bitch," Aaron growled, louder this time. Ryerson opened his mouth to argue, but he found himself unable to resist Aaron's words, beginning to lick up the cum oozing out of Aaron's cock with his tongue. Aaron grunted in approval, running his hands through Ryerson's hair.
Unbeknownst to Ryerson, by giving Aaron a more dominating body, he had actually switched their roles in the spell. Now Ryerson was obeying Aaron's commands instead of the other way around. Even worse, Aaron had excreted his original DNA as a geeky teenager directly into Ryerson's ass when he came, and the cum was starting to mix with Ryerson's own DNA and change him. Ryerson continued to lick away at Aaron's cock until he had swallowed every last drop of cum, not noticing that he was starting to grow shorter.
"Here, let me get you off," Aaron smirked, reaching his hand down and stroking Ryerson's boner. As Aaron jerked him off, Ryerson's dick slowly started to shrink down, dwindling away in Aaron's grasp. As his cock continued to recede, the sensitivity was increasing tenfold, and Ryerson moaned aloud in pleasure, noting that his voice sounded a bit more high pitched than usual. Ryerson's dick settled in at a new length of 5 inches, still respectable but nowhere near as big as the man once had been. His balls similarly shrank down to about half their original size as his pubic hair pulled back into his crotch, leaving him completely smooth.
Ryerson was now roughly 5'6" tall, meaning that Aaron was at least a foot taller than him. Ryerson's body was slowly starting to de-age, the gray hairs on his head darkening as the wrinkles on his face faded away. His body started to lose both muscle and fat, his muscle gut sinking inwards to form a perfect six pack of abs as his pecs tightened. His muscular thighs and calves started to thin out, remaining defined but taking on a much slimmer appearance. His shoulders and biceps similarly shrunk down, leaving Ryerson with a slender frame. As Ryerson continued to regress, his body filled with hormones as he re-entered the youthful prime of his life and his dick erupted with cum in Aaron's grip.
Both Aaron and Ryerson's minds clouded as reality began to alter to fit their new physical experiences. Aaron was now Coach Hardcock, a college basketball coach who made it his goal to fuck every player on his team. Coach Ryerson was now Steven, the college freshman who was willing to do anything to make the team.
"So, Coach," Steven asked, flashing Coach Hardcock a wink and a heartbreaker grin, "Did I make the team, or do I have to do more to convince you?"