Sandara Park always with her friends -they are three in a group their Leader ChaeLin (CL) strongest,  Park Bom pretty one the 2nd member and Sandara Park 3rd member the smart one , they are the best group in their school which is all girls school in Seoul.. Sandara always has an insecurities towards to their leader because CL has strong personality unlike her she is just beautiful and genius..

Kwon Jiyong -Rich ,  Good Looking guy number 1 in all boys school in Seoul a genius and has strong personality but he is not perfect when it comes to love .. All girls have crush on him but he doesn't care about them,  he always got a indecent proposal but he refuse that.. He believed that love is not for him.. He has a best friend name YoungBae he is the number 2 same as Jiyong hes smart but the difference between them is Young Bae is approachable to all hes down to earth unlike Jiyong has A Prince syndromes..