[Note; Sorry, his reactions might be uncanon.]

AlHaitham grumbled, clearly annoyed by the huge mess created by the children that went in.

"...mh. It seems their caregiver couldnt even clean up for them. Hmph."

He huffed, organizing the books and putting them in their proper place, then suddenly he heard a knock on the door.

Kaveh?

"Need something, Kaveh?"