The whole story of a married woman who is attracted to a part-time college student instructor she meets at the cram school where her son attends and has an affair. She is excited by the young man's fierce advances and has an affair whenever she has the time, even if it's 30 minutes or an hour. The horny wife gets soaked by the saddle of the mamachari bicycle that touches her crotch, and heads to her affair partner's house again today...