KIM HYOYEON :

A 21 y rich & Normal high school girl. She attends the same school as Lee Eunhyuk. She is a kindhearted, innocent, honest person. Kim Hyoyeon have just agree to marries the Eunhyuk because of the promised arrangement made between Kim and Lee's Family. Her initial reaction to Eunhyuk is one of irritation as she does not want to marry this young and to the unemotional Serious Prince. Until she falls in love with him as She didn't not knowing that he, in turn, starts to feel the same way..

LEE EUNHYUK :

A 23 smug, indifferent, insensitive and lonely, sensitive, warm and kind young man.. He decides to go along with the arranged marriage with Kim Hyoyeon. At first, he is irritated and doesn't like her childish attitude but as he recognises how genuinely sweet she is, he begins to open his heart to her, and falls in love.

KIM BUM :

Bum left Korea at the age of 10 . He is warm and kind young man, He falls in love with his 1st cousin Kim Hyoyeon since there childhood as she was also his first love, But because of their family argue in some on their business. They decide to leave the korea, He didn't recognize that his cousin is already married with someone.