Cho Kyuhyun has never lost a bet with his best friend-until now. His punishment? Make a girl in school fall for him and then break up with her just as she's fallen for him. But who would be oblivious enough to fall for that? Her

Enter Lee Sungmin-quiet, brainy. And unassuming-the perfect pawn for thier game. And for Kyuhyun that's all it is-a game. But is it? Kyuhyun finds out the Sungmin is quite more that he bargained for. Perhaps he has her figured out all wrong. The real question is, will Kyuhyun win the bet, or will Sungmin win him over instead?