Kei's eldest sister Sandra is a hot-tempered magazine editor and her temperament has left her single all this while. One of the family rules is that none of the siblings could get married before their eldest sister. Kei seeks help from the famous Casanova, Koo Chai, to pretend to court his eldest sister and lure her into the mood of love.
| Actor | Role |
|---|---|
 Louis KooDr. Dick Cho | Dr. Dick Cho |
 Sandra Ng Kwan-YuYu Chu | Yu Chu |
 Ronald Cheng Chung-KeiYu Bo | Yu Bo |
 Yao ChenBucktooth Jane | Bucktooth Jane |
 Raymond WongConan | Conan |
 Miki Shen Li-JunMandy | Mandy |
 Ha Chun-ChauMr. Yu | Mr. Yu |
 Lee Heung-KamMrs. Yu | Mrs. Yu |
 Guo TaoChu Yu's Boss | Chu Yu's Boss |
 Charlene Choi Chuek-YinInsurance Agent | Insurance Agent |
 Lisa ChengKuen | Kuen |
 Sheila Chan Suk-LanSheila | Sheila |
 Susan Shaw Yam-YamHuan | Huan |
 Yumiko Cheng Hei-YiVivian | Vivian |
| CCinderella Li YiranLynn | Lynn |
 Lam Tze-ChungFat Man at The Beach | Fat Man at The Beach |
 Cheung Tat-MingProfessor of Breakup | Professor of Breakup |
 Clifton Ko Chi-SumButler | Butler |
 Ken Lo Wai-KwongBoxing Coach | Boxing Coach |
 Ricky Chan Po-YuenNot listed | Not listed |
 Danny ChanNot listed | Not listed |
 Steven Cheung Chi-HangNot listed | Not listed |
 Ricky Fan Chun-FungNot listed | Not listed |
 Conroy Chan Chi-ChungDirector | Director |
 Mark LuiDoctor | Doctor |
 Barbara Wong Chun-ChunServant | Servant |
 Ricky Wong Chun-TongServant | Servant |
 Vivi LeeServant | Servant |
| AAnna LaiServant | Servant |
 Steven Fung Min-HangInterviewee | Interviewee |