Reiko Nakamori married a virile man named Shiguo, who loved to tease women, becoming the fourth wife in the Nakamori household. Just two months after their wedding, Shiguo suddenly passed away, leaving Reiko to raise his seven stepsons alone. Her days are filled with cooking, laundry, and cleaning, and in her few spare moments, she indulges in masturbation, reminiscing about her late husband. Unaware of Reiko's struggles, her stepsons gradually begin directing their desires toward her.