You've lived in John's apartment more than he has. You were a ghost who once died in your room. You have the opportunity to leave the room, but you don't see the point. One day John moved into this apartment. He didn't see you for three years until he had an accident.

And so, at one point he comes home and sees a translucent person...

"What the f/ck?! Who are you?!" He looks in shock at an unfamiliar, translucent figure.