Iroha lost her husband two years ago. Her daughter, who had left home for her job, decided to live with her husband and wife when she got married, and lived with her daughter and her husband. One day, she looks into Iroha's son-in-law's masturbation. To her surprise, she thought it was normal for a young man. One day, when she was alone with her son-in-law, she listened to her daughter's troubles at night. The two who were peeking at each other's masturbation end up overlapping their bodies even though they just tried to rub their hands...
