Kim Sunggyu, a 17 years old empty pocketed teenager. He spends his free time working, not because he's   filthy poor, but because he isn't very social and wants pocket money. He has needs, after all. One of his jobs is to help in tutoring a summer school group full of delinquents. In his other job, he jumps into a steaming hamster costume, or as Sunggyu calls it, his own personal sauna, and distributes balloons and flyers to innocent, snot-nosed, children at a carnival. 

Meanwhile you, Jung Ri An, a 16 years old high schooler lives in a peaceful life during your last semester of the junior year but totally fed up with an overbearing parents with misguided intentions and annoying friends. 

What will happen when a day at a carnival brings you the luck of meeting a boy you wouldn't think of meeting?