After his father-in-law died, his daughter and her husband, Kazuya, who were worried about Madoka's mother-in-law, decided to live together. At first we were nervous about each other, but now we are completely open. One day, Kazuya witnessed Madoka's masturbation. After that, Kazuya can't help but masturbate with Madoka's panties. However, that figure was found in Madoka's mother-in-law ...