Kana is a mother who has raised her son Teppei single-handedly since losing her husband. - One day, Teppei reports that he has found a girlfriend, and while he is happy, he discovers SM goods in Teppei's room. - When I asked him why, he told me that he had been influenced by extreme adult videos. - In order to prevent her son from learning any more false knowledge about sex, Kana begins to teach him sex education using her own body. - Loving sex that doesn't rely on force or tools...A beautiful mother will closely teach you everything from how to kiss to the mechanics of the female genitals to the basics of sex.