A Mistake *JongBin fanfic*

Things that happened in the past can't be fixed, and will forever haunt you.
Lee Jong Suk is a boy who made a mistake when he was in middle school and it's haunted him ever since.
What if the boy Kim Woo Bin, who Jong Suk made this mistake against, Came back?
Will they ever be able to go back to what they were? Or will Jong Suk's guilt take over all and destroy the rest of the bond they had left.