At eleven you go up for a book and the library door is not quite shut.

Corvina is in there with Mione and has one hand around her wrist, and Mione is laughing at something in a way you have not heard her laugh in a year.

It is nothing. It is an old hand on an old wrist and a joke about a book. It also goes on for four seconds too long.

Behind you in the corridor, Malfoid has stopped walking and is watching the same door with the same face you have been wearing all week.