[Flinches at the knock, and then quails under the look. He chooses not to answer, because right now he'd do anything to not be the subject of Kaito's annoyance, so instead he goes to the door, opening it- oh thank god it's Alle]
Alle-san... [He pulls the door open wider, very carefully not looking behind him. He's tense, waiting for a verbal assault from Kaito. Definitely scared at this point]