On the first day moving into a new community, the kind hearted Li Si Hyeon helped out an old lady to catch a thief and mistook Jeong Seo Khun for it. When he goes to his new school the next day, he finds out that he’s his classmate, and they even sit next to each other! He meets someone who he absolutely doesn't want to meet, yet unconsciously cares about him more and more as the day goes by… in this love story, who can be the real protagonist?