Se-ran, the mistress of Hyeon-ma, lives in a massive traditional-style house called "Blue Mansion"in the suburbs of Seoul with her sister Mi-ran and their maid. One day, Hyeon-ma comes to the house with his newly-employed handsome male secretary/secret lover Dan-ju.
| Actor | Role |
|---|---|
 Choi Ji-heeSe-ran | Se-ran |
 Namkoong WonHyeon-ma | Hyeon-ma |
 Hah Myung-joongDan-ju | Dan-ju |
 Yun So-raMi-ran | Mi-ran |
 Yeo Un-gyeOk-neyo | Ok-neyo |
| YYu Pan-ungNot listed | Not listed |
| LLee Young-hoNot listed | Not listed |
| PPark Jeong-haeNot listed | Not listed |
| LLim Hae-limNot listed | Not listed |
 Kim Ki-beomNot listed | Not listed |
 Yun Il-juNot listed | Not listed |
| KKim Seung-namNot listed | Not listed |
| JJi Gye-sunNot listed | Not listed |
| CChung Mi-kyungNot listed | Not listed |
 Kim Ji-youngNot listed | Not listed |
 Ra Jeong-okNot listed | Not listed |
 Yang ChunNot listed | Not listed |