The Problem is that the Demon King is a Saint

I thought I was dead, but I was reincarnated into a novel. That too, as the dungeon master, the Demon King 'Anastasios'. “Wow, awesome. So I don’t have to pay the 600,000 won monthly rent for a 23-pyeong studio apartment?” I woke up after a 100-year slumber due to the aftereffects of overwork, but that’s about it! Because the owner was asleep, the dungeon rank plummeted from S-rank to D-rank, but that’s not bad! Why? Because I’m the Demon King. *** … … Even though I’m clearly the Demon King. “You are now my dungeon monsters. I’ll give you a house and pay, so you can immigrate here.” “Boohoohoohoo!” “Can you punish them, Demon King, so that there won’t be more victims?” “I was going to ...