In the third year of her marriage, Masami, who lost her husband, decided to live with her father-in-law. One day, tired from housework and falling asleep, she is raped by her lustful father-in-law. The sexless Masami is driven to orgasm by the middle-aged man's persistent full-body caresses and skilled techniques, and she becomes addicted to perverted, intense sex. She falls into a relationship with her father-in-law that she cannot tell her husband about...