Reiko, whose working husband refused to engage in marital activities, masturbated violently as if to express her dissatisfaction with him. - Tatsuya, the son-in-law, who was secretly looking into Reiko's obscene behavior, attacked Reiko. - Reiko tries desperately to resist her husband, who is worried about him sleeping next to her, but when Tatsuya confesses his love to her, she gives in. - My husband is right next to me. - Reiko desperately tries to suppress her voice in the tension that could be revealed at any time, and Tatsuya quietly and carefully sinks his cock deep into her vagina. - Captivated by the thrill, the two begin to take bold action...