Cha Jin Wook (Sung Hoon) is the son of a wealthy family. His family owns one of the largest companies in the country. It is the second-generation chaebol, indifferent and cold that loves fun. He is the typical rich playboy who only has romances, a man of which every woman is crazy, but he feels nothing for them and enjoys parties and clubs, always being the center of attention wherever he goes. Lee Yumi (Song Ji Eun) is a young, single 25-year-old woman with a bright personality who does not do much with her appearance, she does not wear make-up or bother fixing herself, is very informal and unconventional. Her mother was an erotic actress and that changed her life from the moment she found out. Due to the bullying he received at school, he began to dress conservatively, which is why he shows such an appearance. She has never had a date before, so she is surprised at herself when she meets Jin Wook and spends only one night with him after being delighted by her cunning and playful