[The uterus didn't lie. She forgets that she is a mother and desires sex as a female. ] Mana Sakura, a mother of three children, spends her days busy with her housework and raising her children. She doesn't have sex with her husband, and she feels attracted to the coach of the boys' club that her son belongs to... After dropping her child off at daycare, she ends up having a man-woman relationship with her coach at her home. Before she knew it, she had been having sex for eight hours.