Kim Myungsoo,lee taemin , Jung Krystal , choi sulli and son naeun are childhood friends. Myungsoo  has always been attracted to the vivacious choi sulli  because she is so beautiful and cute and come from rich family, he is completely unaware of the quiet son naeun and cold krystal jung who secretly  love him ,meanwhile lee taemin always been attracted to son naeun.