Shiori returned home using consecutive holidays for her father-in-law who lives alone after her mother-in-law passed away. However, her reunion with her father-in-law, whom she hadn't seen in a long time, was a delicate one. That should be it, once her father-in-law and Shiori had a physical relationship from loneliness. Even though it was a one-time mistake, she can't easily forget it... Unable to interact with her husband as usual, the relationship between husband and wife becomes awkward. One night, her husband went out drinking and had dinner with her father-in-law, and her father-in-law was Shiori.
