Amamiya, a teacher and swimming club advisor, likes younger guys and has been secretly eyeing the swimming club's ace, Kuroi. When Kuroi gets a girlfriend, she becomes jealous and transforms into a lustful monster teacher who steals him away by twisting his nipples... He appears like the wind, takes him from behind, hugs him from behind, and twists his nipples until he falls into depravity. "Does my girlfriend make me cum this much?" "Which feels better, my teacher or my girlfriend?" Amamiya-sensei's intellectual nipple-tweaking techniques are clearly on a different level from his girlfriend's...