The Day of Swapping (2017)
Original title: 스와핑 하던 날
The Day of Swapping is a 2017 Korean-language romance movie directed by Myeong Seok Hwan, with a running time of 1h 21m. It stars Joo Ye-bin, Baek Se-ri and Min Do-yoon.
Min-ho and Jeong-il end up working with each other's wives one day. As time passes, the men feel attracted physically to their friend's wives. In the end, Jeong-il suggests to Min-ho, "Let's not take sides and just be happy as the four of us!" They start swapping each other.