A Senior student at Harvard Medical School. She is a smart and intelligent, immigrated when little and while being brought up by her hard working father, she gained her independence and vitality. She is very honest with her feelings and knows what true love is, therefore she is ready to give up her chance of her lifetime for her love for Hyun-woo. Hong Jung-min (Lee Jung-jin) An American rationalist and man of principles.

Good mannered dresses neatly and has an aristocratic appearance. He has a rather cold and intellectual look, and is full of confidence. One may tend to think that he was brought up with no difficulty, however he’s deeply hurt by the lost of his father. His father had passed away after his company went broke during a lawsuit lead by Hyun-woo’s father’s law firm. Yoo Jin-ah (Kim Min) A typical girl raised in America. She is tenacious and possessive girl, who has to get what she wants no matter what. She has a desire to simply possess Jung-min at first but she falls in love with him. To win his love, she comes up to the point where she sacrifices herself, but nevertheless she fails to win his heart.