My dad remarried. His new wife is surprisingly beautiful and busty. What's more, she wanders around the room completely naked with that body... Yukino is found masturbating naked in the living room with her new husband's son as her masturbation aid, and she boldly provokes him. "I'll teach you how to study."Sumire, who used to be used to spending her time naked until she got married, now gives her stepson a close-up lesson in see-through clothes! There are also other highlights, such as a stepmother with a nice body who is forced to live completely naked, and the perverted temptation of a kitchen drunkard. This is a four-part story of forbidden domestic infidelity.