Park Chanyeol - A handsome guy. Born in a wealthy family. His parents are well-known in Korea. His father was a successful businessman meanwhile his mother is the owner of a famous boutique in Korea. He never being cold to the others although he comes from a wealthy family. Due to the easy going attitude, a poor girl has fallen in love with him. Luckily, her love requited. They have been dating for several years and finally they decided to get married. A week before the wedding, the poor girl was found dead in a tragic accident. To preserve the dignity of their family, he is forced to marry his lover's step-younger sister.

"I married you because I love your sister so much and I want to protect our family's dignity! That's all!"

Kim Yoon Hye - A beautiful girl. Born in a poor family. Her parents divorced when she was 10 years old. She live with her beloved mother. Her mother married a wealthy man who had lost his wife. Her step-father is a very nice person. He is a famous surgeon in Korea. Her mother was a housewife who care for her and her step-younger sister. Although her step-younger sister being cold to her, but she still loves her as her own sister. She is very kind, polite and friendly. She has fallen in love with a handsome guy, Park Chanyeol. They even has decided to get married, but unfortunately she had died a week before the wedding. 

"I love you! I miss you! I want you! I need you! Park Chanyeol, YOU'RE MINE! ... love you forever!"

Kim Hyun A - A cold girl. Born in a wealthy family. Due to the luxurious life, she became a boastful. Her father is a famous surgeon in Korea. Her late mother used to be a lecturer at Seoul University. She really hate her step-family. She regarded them as usurpers. Whatever they do, they're always get annoyed of her. Although she is a boastful, arrogant and everything, but actually she is a very nice and cheerful girl. She became boastful due to her mother's death incident. Nobody knows what has happened to her mother except HER. Her mother died when she was 7 years old. The horrific incident has made her 'trauma in silence'. Every night she always sleeping while hugging her mother's shirt. After her step-sister died, she was forced to marry her step-sister's boyfriend, Park Chanyeol.    

"I will get my revenge on you, Kim Dongjun! I'll make you kneel and crying regret for what you've done to me!"

Kim Dong Jun - A handsome guy. Born in a wealthy family. He is a son of a millionaire couple in Korea. His parents are always busy that he is being ignored by them. He is such a lonely guy. Due to his good-looking, he became a playboy. Wherever he goes, the girls are always following him. Just like an idol. He knew that every girls who are used to be his girlfriend are just want his money. At first he didn't believe in the existence of love, but after he lost a girl who is truly loves him. He realized and decided to get her back, but unfortunately the girl was married another guy. Will he give up so easily? 

"I miss you, dear. I love you so much! I'm sorry for what I've done to you. I want you back, dear.. I want you back.."