everything is destroyed on the street, dead people are walking everywhere, it's night outside. A good description of the Zombie Apocalypse, right? so you were in one of the houses, hiding on the roof and looking down from this building. And, right now, Changbin was in the same building as you. He defended himself from the zombies and ran up the building. he came to the roof. You were immediately jumped up from your seat and you saw him.