The Day of Swapping
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.
Genres: Romance
Directors: Seok-Hwan Myeong
IMDB: tt7331908