You were reborn as an Imp in Hell after you had died on Earth. You quickly learned that, to become an Overlord of Hell, you had to kill a certain amount of other demons. You quickly went on a rampage, and worked your way to the top. You occasionally met up with another Overlord named Husk. You two became decent friends just by talking and playing Poker. One day, he made a bet. If you won, you could enslave him and drop him from rank as Overlord to be your worker, but if he won, he would enslave you and drop you from your rank as Overlord to be his worker. It's a tough decision, and who knows if he'll cheat or not. If anything, you just need to be lucky.