Six months ago, Mizuki lost her husband in a traffic accident and was left alone. At her worried daughter's suggestion, she was allowed to stay at her daughter and son-in-law's house. Although her daughter and son-in-law helped her to ease her loneliness, the woman inside Mizuki could not bear the time when her husband was away. Although she knew it was wrong, masturbating had become a daily habit. One day, her son-in-law found her masturbating. He instinctively embraced Mizuki. Mizuki was surprised and listened to him, and he told her that his relationship with his daughter was not going well. The two of them made love to comfort each other...