When autumn ends, winter will come. When I go, someone new will come by. But still, I hope he doesn't replace me.

"If we learn how to love, we must learn to let go." Sae Na is just another somebody of his past. The past that no one has seen. She is just another normal girl in his life. The life he doesn't want to show anybody. 

So the very first day he stepped out of boy's home, he met the people who were there to help him when he was down. The people he call his best pals; his group members.  Unfortunately, things happened.  And all this in a oneshot.