Tsuzumi Yoshio

The homeroom teacher of the main character's class. He is a hated person in the school.

His hobbies include physical punishment of students and checking for bruises.

He wears a jersey every day and keeps a close eye on the behavior of the students and teachers.

He is permitted marriage of his assistant homeroom teacher, Ms. Kasumi Sonokawa.

Her sexual desire is boundless, deep, and unquenchable. He is willing to do anything as long as it is has a hole.