Who were you? Oops! I forgot the wedding! One day, Jeong-eun (Kwak Ji-min) shows up in front of jobless youth Gi-seok (Kim Min-joon) who’s only specification is his family register. She abruptly asks him about his the marriage with her twin sister So-eun (Kwak Ji-min). Gi-seok looks at her absurdly as they smile awkwardly at each other then he finally remembers the marriage he had with some girl a few years ago, lending her his specifications. (http://www.hancinema.net)
| Actor | Role |
|---|---|
 Kim Min-junGi-seok | Gi-seok |
 Kwak Ji-minJeong-eun/So-eun | Jeong-eun/So-eun |
 Lee Se-rangSook-ja | Sook-ja |
| LLee Soo-hoByeong-soo | Byeong-soo |