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.
| Actor | Role |
|---|---|
 Joo Ye-binJi-seon | Ji-seon |
 Baek Se-riHye-soo | Hye-soo |
 Min Do-yoonMin-ho | Min-ho |
 Suh Zi-eunJoo-yeong | Joo-yeong |
 Jang Seok-minJeong-il | Jeong-il |