The King of Hell is my roomate?!

How would you feel if you suddenly got a roommate or else you would be evicted? And that roommate turned out to be the literal King of Hell?!...Wait that's possible? 20 year old Myra was finding herself in a predicament when she turned 20, find someone to share the place with or get evicted and thrown back onto the streets. But what if a certain stranger was suddenly interested in what was to come with it? Only for the two to make a deal, that would warp both lives for the better or worst? Why was the King of Hell even on earth? What was his purpose? .....And what does it strangely have to do with her dead older brother?