He couldn't help but peek at his wife's mother, Yuko, changing clothes. Even through her underwear, he could see her soft, ripe breasts and her beautiful bodyline. Overwhelmed by her breathtaking sex appeal, the son-in-law had an evil desire. He would like to get a taste of this beautiful body, even just once. However, the woman he was looking at was his wife's mother. He shouldn't have touched her. He tried to suppress his worldly desires by using all his rationality, but suddenly, an opportunity presented itself...