One day, the mother witnesses her son Atsushi masturbating while looking at a pornographic magazine. Knowing that her son is not good with women, the mother tries to use her body to help him become immune to women... She becomes worried about her son's caressing and sex, which he only knows from pornographic magazines. From there, the mother begins her son's sex education... And as the son and mother make love again and again, their bodies gradually improve...