Ayaka Muto is a married woman with two daughters, ages 6 and 2. She has not had sex for two years, and from her friend's experience, she says that sex can improve a woman's charm. She gradually strips off in front of the camera and exposes herself as she masturbates. When a stiff penis is stroked in front of her, she has sex with a penis other than her husband's for the first time in two years. Eventually, she even accepts her first threesome.