Hatori Yuu has a problem: his sex drive is so ridiculously strong it’s disrupting his day to day life. If he doesn’t jack off at least three times a day he gets so horny he can’t concentrate on anything else. His half-hearted responses in class and general inattention haven’t gone unnoticed, either, and his teacher, Takehaya Kaori, has scolded him on a number of occasions.