Jung Hyein is an ordinary person yet kind-hearted that every boys want her . But she never accept one of them since she doen't want to give her first kiss to anyone . And she always being with her childhood friend , Park Jimin . One day , 6 students move to their school and one of them just caught her eye , Kim Seokjin .
But what will happen if she fall in love with Seokjin ? And what will Jimin feel after his friend that he loves very much just fell in love with another guy ?