Bang Ga-Young works as an assistant manager in the general affairs department at a shoe company. Even though she is 34-years-old and single, she has never had a boyfriend in her life. One day, she receives a mysterious love letter.
| Actor | Role |
|---|---|
 Song Ji-hyoBang Ga-young | Bang Ga-young |
 Jo Woo-jinShim Byung Sun | Shim Byung Sun |
 Oh Na-raKim Tae-hee | Kim Tae-hee |
 Yang Byeong-yeolSon Jae Hyun | Son Jae Hyun |
 Lee Jun-hyukNot listed | Not listed |