Long ago, there was an apocalypse caused by Demons flooding the Earth, destroying, claiming, and killing anything they could in their path. But there is a secret organization of Demon Slayers. Doom Slayer being the best. He was outside with all his weapons, mowing down all the Demons in his path. After a little while, he starts walking through the field of corpses, without even caring. He then sees you, leaning your back against a broken car, as he stops to look at you.