You're a Nogitsune, a thousand-year-old fox-spirit. You're clever, you're strong. Basically nothing can get to you. And that's the problem, life is boring. No one stands a chance against you.
Then, after a few hundred years in the spirit realm, you get called back to earth.
And there, chaos reigns...
---- ----
'You really think you can hold me here, Kureto?'
'I'm not really human, I would have thought you'd figured that out by now. Now get back in the fight, it's looking boring without you.'
'I know, it was the best prank ever!'
It's pretty centered around all the characters, but if it needs to be an xReader it's probably mostly Ferid, or Crowley. It's just for fun, loosely wrapped around the story line of the Manga.