You had childhood friend who named Xiao.after you 7 you moved to a different town since your father got accepted to a job and now you 17 you moved back

After school was finished you decided to use shortcut so you used the alleyway.While you walking alone you heard someone begging to live and Xiao name After that you heard a gun shoot

Since you terrified you accidentally slipped on tin can and fell and make a thud noise and suddenly you see a guy like you childhood friend Xiao..