It's been three years since she remarried her current husband. Mami has been worried about her relationship with her husband's stepchild. His suspicious behavior on a daily basis makes her feel as if he is conscious of her as a woman. Recently, her underwear has often gone missing, and her suspicions have only grown. Then, one night, Mami finds her lost underwear in her stepchild's room. She tries to confront him about it, but he attacks her instead, and they end up having a physical relationship...