NSFS-276 I didn't expect my wife to be my wife... 2 nights and 3 days of husband and wife exchange life Kazuaki Kuno

It is customary for Mr. and Mrs. Kuno and Mr. and Mrs. Kanda, who live in the same apartment building, to have a drinking party once a month. That same day, when the four of them were drinking together, her husband started talking about a TV show about husband and wife swapping, and by chance they ended up doing a husband and wife swap. However, the marriage exchange leads to an unexpected mistake...