Yun Hee closed her heart to love years ago. But can Seoul's greatest playboy, aka her jerk boss, change her perspective of what love is?

Brief character's description:

- Kim Jaejoong: 26 year-old handsome guy, CEO of Kim Enterprises. A playboy who sleeps with pretty much every girl who approaches him, he may look cold-hearted at first but he's caring and worried. Lost his parents when he was 20 on a car accident and had to take care of his father's company right after he finished university.

- Lee Yun Hee: 23 year-old pretty and intelligent girl. She is european but was adopted by a wealthy korean couple when she was 5. Studied economy on the United States. Hard-worker and cheerfully, but has a mysterious past she keeps hiding and which made her close her heart to every guy who approaches her.

- Min Ha: Yun Hee's best friend, younger and cheerful girl, currently studying.

- Junsu: Jaejoong's best friend, works at Kim Enterprises as an economist. He's the serious guy Jaejoong needs by his side to advice him.

- Changmin: he's like a younger brother for Jaejoong and Junsu. He's always joking and looks childish, but can give great advice when it comes to his hyungs.

- Yoochun: ???