One day, a mother who witnesses her son Atsushi masturbating while looking at an erotic book. When she finds out that her son can't get along with her woman, her mother uses her body to try to build immunity to her woman... She is worried about her son's caresses and rough sex, which she has only knowledge of erotic books. From there, her mother's sex education for her son begins. And the son and mother, who are improving little by little, match their bodies over and over again.
