Haruko consulted her mother, Mihoko, about the lack of excitement in their married life. Unsure of what to do, Haruko asked her husband, Ikio, who suggested they go on a hot spring trip together. On the day of the trip... Ikio saw his in-laws laughing non-stop in the unusual atmosphere and smugly felt that the trip was almost a success. The true purpose of Ikio's trip was to seduce his mother-in-law, Mihoko—. After dinner, slightly tipsy Mihoko was quickly taken to another room by Ikio...
