My Sweet Dara (2004)

Daniel and Andrew are two playboys who are at odds with each other. Each of them has a mentor, namely Reno and Eros, who were also enemies and rivals in the past. Betting begins to get the same girl named Cleo, with the winner being named the number one playboy for the next ten years. Without them realizing it, Cleo is the twin sister of Dara, Daniel's household assistant, who secretly has a crush on Daniel.