Hinano, a female student. She recently got a boyfriend and was a quiet honor student who had a pure relationship, but she has a delusional habit and indulges in masturbation every day, imagining having sex with old Mr./Ms. and others. I liked my boyfriend Yugo's things, but I couldn't do anything to direct my sexual feelings ....... - One day, she is attacked in her sleep by Koji, a man in the neighborhood who brought a circular board, and has sex. - With that, the men who are Koji's drinking friends also fall into the days of debauchery.