The story begins when the male and female trainees of JYP Entertainment compete against each other to get a chance to debut to be the next boy or girl group. But the stars were writing a different fate for our beloved idols. To their surprise they debut together as a Mixed group. What will their relationships be with each other and how will they affect in their journey?
Will it be a toxic train with love triangles or will they be in a bubble working for success? The story starts from predebut and continue with their journey along the way.