Sawatari Masataka

Японское имя:	佐渡 正敬
Прозвище:	Waseda

The class's homeroom teacher. He is only attracted to female university students. He also regularly has consultations with Yamai; a running gag involves his glasses breaking when Yamai mentions something regarding her chunibyo behavior. Outside of school, he is secretly a Vocaloid producer who goes by the name Teishotoku-P.

Wikipedia