Shiori has returned to her husband's parents' house. This year, her mother-in-law's first Bon festival was held at her parents' house. Her father-in-law, whom she hadn't seen in a long time, looked a little tired and lonely. However, he was strong and strong, and was able to support his son and daughter-in-law. 1 He acted tough like a man. Shiori was Kokoro by the manliness of his father-in-law, who was different from her husband, and the loneliness he sometimes showed. One day, she made her father-in-law's favorite food, botamochi, to cheer him up. The taste was exactly like the botamochi made by the late Tomiko, and Shiori's appearance was exactly like that of his late wife, so before she knew it, her father-in-law was crying and hugging Shiori. Her emotions were uncontrollable and he ended up having sex with Shiori. However, this sexual act was different from that with her husband, and Shiori felt love for her father-in-law's ex-wife, so she decided to only have sex for one week during the Obon holiday, and despite feeling guilty about her husband, she went ahead and had sex with her father-in-law.