The Kazama family was originally a wealthy family, but their husband's business failed and they fell into decline. Yumi, a mother, gives up on her husband and struggles to raise her son, Seitaro, into a fine adult. However, Seitaro explodes due to the overly strict education and pushes Yumi down. Then, she calmed him down by saying, ``Okay, if you want to go that far, Mom will teach you,'' and began to teach him about sex. Perhaps it's the result of being constantly disciplined, but Seitaro is unable to disobey her orders. And the mother's Spartan education, which took advantage of her son's adolescent sexual desire and even rebellious period, became even more extreme...
