New girl who new transfer girl at woolim school

One boy alway get attention from all girl but only someone not  intersting to him

Im yoonah and kim myungsoo

Went they meet like fire and water

But if they fallen in love?

But if have someone broke their relationship?

But if someone appears to them and it her first love?

Will myungsoo go away or still with her? 

What yoona will choose first love or new love?

Will them forever or broke their relationship?