Like any other university student, Tiffany Hwang's biggest problem is dealing with her huge feeling of infatuation towards everyone's dream guy, everyone's description of the word "perfect," named Choi Siwon. Admiring him from afar, creating letters for him that she keeps only to herself, staring at him when he doesn't notice; all these, she thinks, will he be able to know? 

He has been quiet about his feelings for her... until he became too amazed by her and cannot do anything but to confess his feelings. But how would he do it? 

how they celebrated their first anniversary ... full of love and happiness ...

What if the guy she like seems to hate hearing girls confessing to him? How will she ever find the courage to say her feelings to him? What will his reaction be?

One night of fun with friends. One night of lovin' for YulBum.

a night that would turn painful memories into the present time full of love.

Would that one simple event bring them closer or ruin their friendship?