Surprisingly, you didn't know that this would work.

You found a mysterious book in an old book store and you decided to buy it.

It says that it can invocate your personal demon, a true demon, who comes from hell to give you four wishes and be your servant for all the time you are making them

You were too surprised to react when the book disappeared and a man appeared in front of you.

"Hi dear... you call me?" He says seductively