After losing her husband, Kazumi decided to live with her daughter and son-in-law. Thanks to the kind consideration of her daughter and son-in-law, she was able to spend peaceful days and heal from the shock of losing her husband, but... As her wounds healed, Kazumi felt that her lost carnal desires could no longer be suppressed. She tried to calm herself by masturbating, but her fingers alone were nowhere to satisfy her. Kazumi's masturbation escalated, becoming bolder and more seductive. However... she never dreamed that her daughter's husband was watching her with an excited look on his face.