Aya lost her husband two years ago and has been living with her daughter ever since. Her daughter, who is a working adult, got married three months ago, but the couple have continued to live together since then, and now she lives with her daughter and her husband. Aya has a problem. She has developed a habit of peeking at her daughter and her husband's sex to satiate herself. In the past, only missionary position was allowed for married couples' sex, as it was considered indecent. Aya, who only knew that kind of sex, was shocked by her daughter and her husband's sex. One day, Aya was caught masturbating by her son-in-law...