A story about 5 friends who seperated after graduating together. But, there was still unsolved romances between them. They all meet 5 years later, finding out that one of them has cancer and that some of them still have feelings towards one another.

Himchan is a boy who fell in love with Seungyeon. When they were high school students, he always had feelings towards her. They both dated, but broke up when they had to seperate their ways after graduating. In 5 years, he hears that she has cancer. He is eager to find her and tell her that he loved her for all this time. 

Himchan

Seungyeon is a girl who is brave and always bright and cheerful. When she was a high school student, she fell in love with Himchan. When they departed their ways, every single night she always thought of him. 5 years later, she finds out she has cancer. She wants to find Himchan before she dies and tell him that she loves him and she never stopped thinking about him.

Seungyeon

Kai is a boy who fell in love with Seungyeon. He is the third friend. When he was in high school, he still had feelings towards Seungyeon. When he found out that Seungyeon and Himchan were dating, his heart fell apart and he stopped having feelings for Seungyeon. 5 years after them graduating, he found Seungyeon before Himchan did. He was the second person to find out that she had cancer. And from that moment on, he didn't leave Seungyeon's side.

Kai

Yoo Bi is a girl who fell in love with JR. She fell in love with him in middle school. When she was in middle school, she fell in love with Kai but got over him when she met JR. She is Seungyeon's best friend. After high school, she went to the same college as Seungyeon and JR. She never left Seungyeon's side. 5 years later, she and Seungyeon go shopping, while they were shopping, Seungyeon faints. She takes Seungyeon to the hospital finding out that her best friend has cancer. 

Lee Yoo Bi

JR is a boy who falls in love with Lee Yoo Bi. Because of his lack of studying, he flunked a grade. But because of that, he meets Lee Yoo Bi. 

JR