Overview
Hye-won, Hee-jung and Joo-hee are university alumni. Everyone is envious of Hyewon who got married first, Hyewon, who has no marital relationship, is more envious of her unmarried friends. Hee-jeong gives her friend Joo-hee, after being proved by Sekpa Min-woo. Hee-jung has an affair with her boss. Hyewon and Joohee discuss changing husband and lover to try. Joo-hee is flirting with Hye-won's husband. Hye-won is attracting Joo-hee's lover. Couples swapping each other and swapping. They break up, promising to meet again.
| Actor | Age then | Age now | |
|---|---|---|---|
 | - | - | |
 | - | - | |
 | 34 | 40 | |
 | - | - | |
 | - | - |