It has been a long time since their relationship ended. They never met again, even though they are very close. Because that's the point. They promise to theirselves that they'll never met and loving each other anymore

I know you do still love me. And you know that I love you since the beginning.

But why? Why do I have to go?

And why can't you let me stay?

"Jaebum hyung, I don't know how to say it. But i can't handle it anymore. I'm so weak."

"I know. I feel it too."