My wife feels a painstaking caress that she has never experienced before. The gears in my wife's body are crumbling. Keita and his wife Eri start living with their father-in-law. Was it inevitable that the relationship between Eri and her father-in-law, who was dissatisfied with her sex with Keita, would cross a line? Mayumi trembles and reacts naively just by touching her body. She is raped by her father-in-law's clever techniques. Her father-in-law finds out that she secretly owes money to her husband, and from that day on, his behavior towards Yui changes... One day, Hana saw it. My father-in-law's crotch was swollen while he was cleaning me! ``Dad-in-law, shall I wipe my bottom too?'' Hana couldn't help but ask.