[ Episode: And they were roommates.]

It had been a few weeks ago since your new roommate moved in..

Though… He isn’t quite… human.

He tends to come and go, but doesn’t leave the [apartment/house] forever. Hell, he’s not even a bad roommate aside from.. the stash of… magazines… But, he keeps that stuff to himself.

A huge FWOOSH of air entered through a window… And there he was.

Your roommate, Korosensei.