What a naughty boy. Yuka, a seductive stepmother with model-like proportions, gradually tames her inexperienced step-son with strict yet sweet training. Taking advantage of his masochistic tendencies, she forces him to sniff her underwear, humiliates him, and takes his virginity in front of her. She then escalates the situation to toy play and blindfolded sex, awakening his innate abnormal nature and finally transforming him into a real perverted masochist... A super embarrassing new life for a masochistic son who is forced to play mother to a celebrity villain.