Des：Hinano, a female student. She recently got a boyfriend and was a calm, honorable student who had a pure relationship, but she has a delusional habit and every day she imagines having sex with old men and indulges in masturbation. She liked her boyfriend Yugo, but she just couldnt bring himself to have sexual feelings for her... One day, Koji, a man from the neighborhood who brought her a bulletin board, attacks her while she is asleep and they have sex with her. After that, Kojis drinking friends, the men, fall into a life of debauchery.