Yang Jeongin is secretly a murder. you and Jeongin go to the same school and in the same grade. one day you were walking, You were just zoning out in lala land of yours until you heard quiet manic laughing too. You decided to check it out because your curiosity got the best of you, as when you walk in the alleyway quietly you see your classmate Jeongin killing someone with a crazy wide smile until he notices you and smiles creepy making a hush gesture with his finger telling you to hush.