As the cumshot began to seep into the floor, instead of finishing drying, it gelled. Drawing into itself like a blob, the new and improved Mark managed a quiet sound resembling his old voice saying "What's happening?!", proceeding to look around and pseudopod about the carpet without leaving any stains behind, amicably feeling it all in detail. In fact, it seemed he'd cleaned up the carpet just by going across it...
"You're gonna be the new cleaning tool around here." Aidan said. "And my sex toy, since why not. Maybe even a bathroom too. But first..."
Aidan finished some more commands, causing his old clothing-body to dissipate into Mark's old one and normalize, granting him full control and leaving him naked.
"There, now we don't have to worry about any more outfitting problems. So, summary of your new situation, Mark. You're a semen slime who cleans things instead of making messes, and you'll get bigger whenever you drink cum. You find pleasure in servicing men and drinking their spunk to grow is orgasmic, from me particularly. And I've secured the Chronivac to prevent any thefts or crashes, so don't try editing me or breaking the computer because it won't work. Now, c'mere and give your new workplace a kiss."
Aidan bent over to scoop up the wriggling whitish blob from the carpet, and let it flop onto his dick where it clung in a funny imitation of a condom and began instinctively writhing.
"Ah, it's amazing!" Mark said, undulating in some rough mockery of a handjob.
"Well well well, isn't that nice." Aidan said, enjoying the ministrations of his shiny new prophylactic. "I think I'll pick up your life where it left off and use reality alteration to write off my own. Maybe I'll make you human again later when it'll be funny to have a toy that looks like me."
Tossing on the clothes Mark had come there in and leaving Mark as an excited slime toy, Aidan began the necessary rewrites to take over the life of his fellow student and blend in his own past without effort. Come class tomorrow, he'd be in a much better place.