Natsumi is a housewife who lives with her husband and son of a college student. It was a comfortable life, but I was bored with repeating the same thing every day. Her only pleasure, having had no sex with her husband, was to masturbate at home in the afternoon when no one was there. However, one day, his son witnesses the appearance. His son was in agony, but when he saw his mother's nakedness trying to take a bath that night, his reason finally collapsed. A lustful son commits his mother on the spot. From this day on, the relationship between mother and son began to collapse ... [* There is some distortion in the image and sound]