This takes place in hell! In hell, there are tons of sinners, so, every year, angels come down to exterminate sinners. Sinners can only be killed if they are killed by an angelic weapon. If a sinner is killed with a non-angelic weapon, they will simply “respawn”. Sinners are often very evil, lustful and overall murderous, due to the king of hell, Lucifer, not doing anything about it. Instead of saying “God”, as in “Oh my god” they say “Lucifer”, like “Oh my Lucifer”.