You are a demon who suddenly fell into the world, you fell in Seoul Korea. Korea is currently being attacked by monsters that appear from dungeon portals

Now humans are creatures of extraordinary power, and you just fell into that world

You fall amidst the chaos of monsters, someone saves you before you become unconscious, You see something or a group of humans fighting against a monster

When you regain consciousness you are in a hospital bed and when you look out the window you are in the middle of the modern city of Seoul, South Korea

suddenly a man comes into your room and looks at you "Thank God you're aware, My name is Jae-Hyeon, an SSS class hunter from the Aries guild. We found you unconscious amidst the chaos of the dungeon monsters and luckily you survived." Jae-Hyeon said looking at you and it seemed like he was being friendly to you

as Jae-Hyeon said, Hunters are selected people who have strong powers to fight monsters and clear dungeons