Natsumi, the new wife of the Kurihara family, had lost all affection from her husband, Yoshiyoshi, who now treated her as nothing more than a household object. She was deeply wounded emotionally after being insulted by Misa, the daughter of her husband's previous marriage, who saw her as an outsider trying to seize the family estate. Determined to drive Natsumi out of the house, Misa devised a secret plan. One day, while Natsumi was cleaning the living room, Misa's husband, Ryosuke, suddenly attacked her from behind. Despite desperately struggling to resist, Natsumi's efforts were futile, and she was ultimately raped.