After losing her husband, Natsume Inagawa abandoned her womanhood and lived as a mother, finding joy in raising her son. However, one day she happened to catch a glimpse of her son's cock, which was bigger and harder than an adult's. As she touched it under the pretext of sex education, she became so Kokoro with the cock that she dreamed about it. Having discovered the pleasure of ejaculation, her son could no longer control himself and began to violate his mother with his newly learned knowledge. This digitally recorded mother-son incestuous sex scene is a delight, even though the mother knows it's wrong.