One night, while her son's friends were staying over to study, Reiko was caught masturbating by one of them. Entranced by her seductive figure, he immediately overpowered her and took her. Another friend secretly watching the scene grew increasingly aroused, joining in by using a vibrator to tease and forcefully bring Reiko to climax. Awakening long-forgotten feminine desires and consumed by taboo feelings toward her son, Reiko plunged into passionate creampie-filled orgies with the young men, losing herself completely in the illicit affair.