Author's Note :

Mutual Feelings ( sunsun au )

Where both Sunoo and Sunghoon got a call from the school that their little brothers fought, instead of solving it, they ended up fighting too.

This is sunsun au written by @loveksnoo from twitter credits to her, now i'm reposting this so that everyone can read her au's btw don't forget to follow her account.

Author's twitter account : @loveksnoo