After her mother-in-law passed away, Shiori returned home for the holidays to be with her father-in-law, who lives alone. However, her reunion with her father-in-law after a long time was awkward. This was because Shiori and her father-in-law once had a physical relationship due to loneliness. Even though it was a one-time mistake, it was hard to forget it so easily... She was unable to treat her husband as usual, and the relationship between the couple became awkward. One night, her husband went out drinking and she was left alone with her father-in-law at dinner, and he said to Shiori...