I don't know if this story has ever been written, but you can imagine a Devil who follows someone around, making their life miserable, solely by offering them options which are never actually taken - a "deal with the Devil" story that only requires the Devil to have the capacity to grant wishes, rather than ever granting a single one.

FWIW (very little), this is exactly how I experience shows like "Ah My Goddess!". The main character routinely refuses to take advantage of a situation that I most certainly would. I can't watch stuff like that.

-Robin