There is a scribble on the back of Bunji's backpack.  It's actually a picture of Aso, Bunji's imaginary friend; Bunji is invited to Chi's house for dinner.  He's amazed by the collection of figures and such lining Chi's room, but the atmosphere turns bad when he's told "Don't Touch!"; Mom's brother from Kochi has come to visit Tokyo.  Mom is busy, so Dad takes him out drinking.  However, without Mom, the two don't know what to talk about...;When Mom was a child, she hated the red dragonflies that would fly at the end of summer and the beginning of the new semester.
You know that my mom was cooling down the soup for me...