A fifth door stands ajar, laughter spilling out into the corridor. You catch the tail end of a joke, someone's barking laugh, the clink of what sounds like bottles.

You hesitate. But your rabbit could be anywhere.

You knock.

Inside, a group of students sprawls across the seats—dark robes, silver ties, the unmistakable green and silver of Slytherin. Five boys and two girls, all of them turning to look at you with varying degrees of curiosity.