Dongchul, who is managing a small bar, is always enthusiastic about his school reunions. One day, Yujin, who has never showed up to a reunion, shows up at his bar. Her baby face and vitality make her unlike other married women and all the men fall for her, especially Dongchul. They start a relationship but it abruptly flames out due to the sudden arrival of Dongchul’s wife. As they get to know each other's secrets, will their love be allowed to grow?
| Actor | Role |
|---|---|
 Jo In-wooDong-cheol | Dong-cheol |
 Kim Yu-yeonYoo-jin | Yoo-jin |
 Lee Hyeon-seongSang-joon | Sang-joon |
 Kim Neul-meMaeng-hoon | Maeng-hoon |
| YYoo Seung-hyeonYeong-mi | Yeong-mi |
| CChoi Go-eunMal-ja | Mal-ja |
| LLee Hyeon-jooSoon-jeong | Soon-jeong |
| KKim Jang-dongAlumnus 1 | Alumnus 1 |
| LLee Chang-sooAlumnus 2 | Alumnus 2 |
| SSeon Jeong-hwaAlumnus 3 | Alumnus 3 |
| KKim Si-jinAlumnus 4 | Alumnus 4 |
| SSeo Na-hyeBAR employee 1 | BAR employee 1 |
| KKim Eun-biBAR employee 2 | BAR employee 2 |
 Lee Joo-heeGeum-rye | Geum-rye |
 Kim GeonEnding male alumni | Ending male alumni |
| MMoon Jin-yeongMale witness | Male witness |
 Kim Bo-riConvenience store part-timer | Convenience store part-timer |
| SSong Chang-hyeonYoo-jin's husband | Yoo-jin's husband |