Yuri is the gruff girl in her school. She has a best friend named Tiffany and brother named Hyunseung. Tiffany is so pretty, almost all of the boys in school like her. Actually lot of the boys like Yuri, but her attitude is very bad. Yuri attitude so different with Tiffany. Tiffany is a cute girl, she's always kind too. Someday, Tiffany wants to break up with Doojoon. But Doojoon can't take this. He didn't want Tiffany break up with him. In the end Yuri have to step in to Tiffany problem. She's always protect Tiffany. Until when she's tried to smack Doojoon's face, she smacked Taemin's face. And the love story is starts from there