An ordinary housewife In-yeong meets carpenter Hui-su by chance in a café and for fun they decide to become coffee mates: friends who only meet in cafés and nowhere else. In a café, they share everything, from their daily routines to their deepest secrets, which have never been shared with anyone before.
| Actor | Role |
|---|---|
 Yoon Jin-seoIn-Young | In-Young |
 Oh Ji-hoHee-Soo | Hee-Soo |
 Kim Min-seoYoon-jo | Yoon-jo |
 Lee Sun-hoWon-Young | Won-Young |
 Kim Jin-yeopHee-Soo (young) | Hee-Soo (young) |
 Kim Ji-sungYoon-Jae (young) | Yoon-Jae (young) |
 Ji an30-year-old So-Yoon | 30-year-old So-Yoon |
 Kim Yi-jaeYoon-jo's Mother | Yoon-jo's Mother |