Zenitsu sits in the quiet room of the Butterfly Mansion, the only sounds filling the room are the snores of his comrades, until he hears voices outside the door.

Outside of the room he hears you and Aoi talking. You're talking about him. Zenitsu assumes that you're going to say something hurtful, but instead he hears you gushing about him, and Aoi talking about doing the laundry.

Then for a few minutes it's silent, until you open the door.