While her husband is away on a work assignment, Rina is left sexually frustrated with no relief, her body aching for release. She gives in and starts an affair with her son's homeroom teacher. However, her son's classmates secretly record the encounter and use the footage to blackmail her into submission, raping her one after another. Worse, they force her to endure creampie after creampie right in front of her own son. The delinquent boys then break into her home, force her to masturbate, and assault her H-cup explosion breasts and explosive ass with milk guns. Their depravity escalates as they involve her son, gang-raping her in forbidden acts over and over. Yet Rina finds herself grinding her hips against the boys' and even her son's dicks, climaxing repeatedly, completely addicted to the pleasure. In the heat of it all, she screams out, "You... I'm sorry!"