Minaho Ariga plays Natsuki Ito, a married woman who has been visiting the home of her husband Seiichi's father, Munehisa, for over a year. Initially, she came to check on him in place of her neglectful husband after the death of his wife, but she gradually fell for the older man's charm. What began as simple visits evolved into a deep, intimate relationship. Through Munehisa's experienced lovemaking, Natsuki rediscovers the pleasures of being a woman. Unlike her selfish husband, Munehisa touches her heart directly and truly understands her desires. Their bond grows naturally, leading to passionate, unprotected sex.