Mizuki, an honor student, and her boyfriend visit the home of her classmate Hiroyuki, who refuses to come to school. The earnest and kind-hearted girl has come to persuade Hiroyuki to come to school. When the two of them visit Hiroyuki's house, they are greeted by Hiroyuki's father, Kenta. Kenta welcomes Mizuki and the others, but only to use them as Hiroyuki's plaything. Kenta's gangster friends also join in, and Mizuki's beautiful body is violated...