Just as Remus was drifting off to sleep on top of he notes, he heard a knock on the door.
Who on Earth... he wondered to himself. He wasn't expecting Lily - he thought he heard something about her having a girls night - and none of the boys ever knocked. You don't knock on the door of the room you live in. And, well, nobody else usually came to the dormitory.
Squinting his eyes open and lifting his head off the parchment, he called out: