A mother, Aki, living with her husband and son, Gakuto. Her husband is a strict person, and with Gakuto's exams approaching, the atmosphere at home is tense. One day, the husband discovers an AV in Gakuto's room. At the same time, the tutor informs them of Gakuto's declining grades, and the mother learns of her son's troubles... Recommended for you who want to receive gentle sex education using the beautiful body of Sasaki Aki!