Starting with 600 Billion, I Am the Manager of Hell

What? Am I dead? And was taken to hell? Didn't you make a mistake? What kind of hell manager do you want me to be? What kind of ghost is a bull-headed horse face? What kind of ghost is a succubus? Isn't this a rush of money? This is not it! King of Hell, Lord Lucifer was wronged! But the economic control of your underworld is really bad. Let me teach you how to earn 600 billion from 800 million in three minutes! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.