seen everything there is to be shown (слэш)

Kink meme prompt: Rin has a nightly visitor in his dorm room. They don't notice that Nitori is very much awake on the top bunk of the bed and listening to everything that's going on below him.
'Perhaps he should set up a throwaway email address and anonymously send Rin a link to the Amazon page for the Kama Sutra. Or Sex For Dummies. Or maybe one of those children’s toys with the colorful shaped pegs that fit into matching holes.'
Basically, Rin is pretty much the worst roommate ever.