When someone you love deeply treat you as if you were nothing, it's nearly impossible not to feel like you truly are nothing. Right?

Yeah that's what happen to the girl named Yoo Jeongyeon when finally her heart said 'enough is enough' The one that willing to sacrifice everything and give her whole to that heartless girl, Im Nayeon. Jeongyeon spend years wasting time chasing nayeon while nayeon do nothing to show any sign of appreciatation at all. But what's jeong have done for nayeon in that period? What's make jeongyeon give up? Why suddenly nayeon try to get close back with jeongyeon? What the reason behind all of these? Why nayeon treat jeongyeon like that? What happen at the last? The ending? Will jeongyeon accept nayeon back? Will they end up together?..