As a senior in high school and as the daughter of a succesful bussinessman, Choi Yeonu faces a lot of critique from society. But one day she receives a call from her mysterious 'boss' telling her that he's got a mission for her - change society.

Yoon Jimin the new girl who's all around humble sets foot into Top High School and turns a few heads because of her accent. Although she makes a few friends, most of the students cast her out. A sudden encounter with the school's 'Most Prized Student Council' catches her off guard and pulls her into a whirl of unexpected events.

'I'm the best person here. Shouldn't I be more proud of myself?' - Choi Jonghyun's head is always filled with self complementary thoughts like so. As the grandchild of the founder of the school, he grew up proud and tall but when he meets the new girl his self esteem started to crumble. He couldn't figure out why she hated him so much. He tries as hard as possible to change her thoughts of him.