堀口 人史

Like Satoru, he is a janitor who joined the school when he was appointed acting principal.

While his student life was filled with fights, he was by chance scouted at a martial arts event and became a fighter.
He worked as a professional fighter for a while, but was forced out of the industry after causing an incident.

After that, he met Satorui while working in the underworld through an acquaintance, and was hired as a bodyguard.

He is just like Motoya and Satoru in that he likes women, and thinks of women as holes for ejaculation.