Choi Yujin is a leader of bad girls in university and always got a lower rank when she actually smarter than she actually thought beside she doesn't care about her being the lowest in the class.     Shen Xiaoting is a new student in the university and everyone like her and she also smartest student and always got higher rank in the class beside she care a lot about rank so she always remind herself to keep doing better.

In which the Kep1er members can't resist falling for Dayeon and her irresistible charms.