I had sex with my daughter's boyfriend... Her daughter's boyfriend came to visit while her daughter was out. Though she was suspicious, Rieko let him into her house, but he forced himself on her and she couldn't resist the young man's momentum and they ended up having a relationship. This relationship must never be discovered. And she must never repeat this mistake. Rieko tells her daughter's boyfriend and tries to pretend the events of that day never happened. But at the same time, Rieko feels that the young cock has ignited the feminine instincts that have been dormant inside her. As a mother, as a woman. Rieko's Kokoro is torn.