Shiho, 41 years old, has been a full-time housewife for 15 years. Her husband, 44, works as a company employee. They have a 14-year-old son in his third year of junior high school. Back when her husband was her boss, they had a relationship and later got married. Her husband earns a decent income, so Shiho became a full-time housewife. They haven't had sex in about 10 years. She found traces of her husband masturbating and lost interest in him even more. While she has cheated twice in the past, those were one-time relationships. She usually masturbates to relieve her sexual urges. Although being sexless is one reason for cheating, her son's rebellious teenage phase is another. Hearing him call her "old woman" makes her feel like she's lost her dignity as a woman, which saddens her. She still wants to feel the joy of being a woman and wants to please a man and fulfill her own desires. Such emotions have started to well up inside her.