Husband Hiroki is often busy with work, leaving his wife Natsumi alone frequently. For Natsumi, who accumulates anxiety and loneliness, her father-in-law Kousaku's presence was the only salvation. Whenever Natsumi faced difficulties, Kousaku would come to the house and help her out. Then, on an important anniversary for the couple, Natsumi ended up spending the day with just her father-in-law because her husband was working. She began to develop feelings for her ever-present father-in-law that went beyond familial bonds. The next day, when Natsumi visited her father-in-law's house, she exposed herself in an unguarded state before him…
