It doesn't make sense, and now the boy's worried about her again.

"All right," he says resting his cheek on the door. "Good night, then." And then he dithers. Should he stay? Should he leave? If he stays and falls asleep himself--because he's exhausted, too, now, and sleep does sound good--then he might fall into her room when she opens the door. Would staying be a invasion of her privacy? Surely she'll be all right.

"Good night, Miss Kuriyama," Autor says again, softly, and pats the door with his fingertips before starting to withdraw to his own room.