Nakata and Tanihara come from the same hometown and moved to Tokyo at the same time. Tanihara is a salesman who works for a real estate company and is cheerful and cool. Nakata works at the city hall and is the type of person who does his work quietly and is rather a shadowy person. The two bump into each other on the go. While we were reporting on our current situation, Nakata mentioned that his night life with his wife hasn't been going well lately. After hearing such a story, Tanihara has an idea and invites the couple to his house and holds a home party where he plans to swap couples.