Minori is a married woman who has been married to her husband's family home for four years. He didn't suffer when he lived with his stepfather, who everyone disliked, and he built a good relationship. Minori lives a happy life, but the only one who is dissatisfied with the husband-in-law's regular schedule, which is a child-making event on the day of ovulation. Short sex that just takes the bland husband's sperm. The act ended that day, and when he headed out to take a shower, he ran into his stepfather. Her stepfather realizes Minori's frustration, and is unable to control her sexual desire, which she has been holding back, and pushes her down...