Yunho and Yoochun are high school students, both the exact opposite of each other. Yunho is rebellious and athletic, Yoochun is quiet and romantic. Hye Bin is the new and naive transfer student. As soon as she arrives, she accidentally breaks Yunho's bike, causing tension between them. Hye Bin becomes quickly falls in love with Yoochun for his gentle nature as he lends a shoulder while Yunho tries to make life hard for her. However, Yunho soon falls in love with her as well. Who will she choose?