Hermione is the one who finds Draco weeping in the bathroom. He flees. She chases him into the Room of Requirement, and the room forces them to face their greatest fears together in order to find the door.

Draco and Hermione wake up together in bed one morning with headaches, no clothes, and horror when they see each other. But it seems there is so much more to it than inebriation... four years' worth of wedded bliss, in fact.