The Kijima family and the Toyoda family, who live in the same apartment, used to get together once a month. Airi and Yukiko of the Kijima family, who are the husband Kanpaku, and the Toyota family, who are in the middle of the world, hit it off with her husband's complaints. A few days later, her husband went to work at the Toyota family, so Airi, who has a strong sense of responsibility, went to listen to the story instead of Yukiko, who was busy. So, knowing the fact that the Toyota family's husband quit her job, Airi decided that she could not keep an eye on her and proposed an exchange couple to her husband and Yukiko.
