山下2.5号

A mature-looking person who belongs to Nayuta's group. He was love with her so tries to get in the way of Shougo.

It should be noted that he wears 4 different T-shirts, each has one Japanese character on it. Every time he appears, he wears a different T-shirt, and the phrase he creates by wearing them in a specific order is "我田引水", which means "seeking one's own interests".