元々は裕福な家庭だったが、夫が事業に失敗して落ちぶれてしまった風間家。夫に見切りをつけ、息子・清太郎を立派な大人に育て上げようと奮闘する母・ゆみ。しかしあまりに厳しすぎる教育に爆発した清太郎は、勢い余ってゆみを押し倒してしまう。すると「いいわ、そこまでしたいなら母さんが教えてあげる」と宥め、彼に性の手ほどきを施し…。躾けられ続けた名残か、彼女の命令に逆らえず言いなりになってしまう清太郎。そして息子の思春期の性欲、反抗期さえも利用した母のスパルタ教育はますます過激に…。

The Kazama family was once wealthy, but fell into ruin after the husband's business failed. Yumi, having given up on her husband, strives to raise her son, Seitaro, into a respectable adult. However, Seitaro, overwhelmed by her overly strict upbringing, impulsively pushes Yumi down. She then soothes him, saying, "Fine, if that's what you want, I'll teach you," and proceeds to give him a sexual lesson… Perhaps due to his upbringing, Seitaro is unable to resist her commands and becomes submissive. His mother's Spartan education escalates, even exploiting his adolescent sexual desires and rebellious phase…