Kanako's "wisdom teeth" got worse and she was forced to undergo surgery and be hospitalized. In order to take care of her husband, Yukihiro, who was left alone, Kanako's mother, Sayaka, will go to her house for a while. Yukihiro spends time with his mother-in-law for the first time in a while, and Sayaka spends time with a young man. One day, Sayaka sees Yukihiro Futo's erect crotch. The two were panicking, but the happening didn't end there...
