Kai was a good boy. He did everything what he was told to do by his parents, by his teachers, by his boss. They told him to sit down and he sat down. They told him to stand up and he stood up. They told him to study well at school, not to play around, to be always quiet, and to work hard. They told him to be a good boy and he was. Kai was a good boy. He studied well at school, got an outstanding degree in Medicine; he married a nice, beautiful woman. He was a good boy.

Yongsun was a good girl. She listened to her parents, she never caused trouble in school and had a good reputation at university. After graduating one of the best universities in Seoul, her parents have asked her to marry a man. She decided that Kai was the best choice, in some ways he reminded her of herself. She thought after marrying him she'll forget her first love. She didn't. To be honest, she was tired of being a good girl.