Miki, a housewife who remarried her new husband and started a new life with her son Junpei. Junpei is nostalgic for her husband, and it seems like a father and son with blood. However, because of that good friendship, her husband teaches Junpei radical sexual knowledge. Miki, thinking about the future of Junpei, tries to give her husband the correct sex education in secret. How to kiss, how the female genitals work, and even insertion ... Using her plump body and big tits generously, she teaches her son love sex.