Six months ago, Mizuki lost her husband in a traffic accident and became alone. Concerned about her mother, she was allowed to live with her daughter and son-in-law. Although she felt less lonely thanks to her daughter's family, the woman inside Mizuki couldn't bear the emptiness without her husband. She had developed a habit of masturbating during those times. One day, while pleasuring herself, she was caught by her son-in-law. Surprised but intrigued, he hugged her tightly. Upon hearing that her daughter wasn't happy with their marital relationship, they comforted each other through passionate lovemaking...