Ayumi's husband had to go on a business trip abroad half a year ago, so she moved in with her daughter. Loneliness and sexual desire make her masturbate every day while thinking about her husband. Her son-in-law is a photographer, and he was also a fan of her when she was a model for racing car commercials. Seeing his son-in-law using his things to masturbate, it seemed that the relationship between the two of them was not good. She immediately came up with the thought of wanting to be sexually satisfied with him. So she began to seduce him by replacing his daughter to satisfy his sexual needs...!