Two years ago, Ayaka lost her husband and has been living with her daughter ever since. Her grown-up daughter got married three months ago but still lives together with her new husband, making them all live under one roof. There was something bothering Ayaka. She had developed a habit of peeking at her daughter and son-in-law's intimate moments just to comfort herself. Back then, she was only allowed missionary position because that's what her husband preferred. Their intimacy seemed so foreign to her. One day, Ayaka was caught masturbating by her son-in-law...