Demons? They're like dementors, right?
ABHP crossover

An Inevitable AU: Three years after Voldemort's death, Harry shows up on Anita's doorstep, rucksack in hand. He says it's for a vacation, but three months later, he hasn't made any signs of leaving. In an effort to get his ass in gear, Anita takes Harry on a quick hunt for a magical felon... only "quick" turns into "hellish, long and full of demon bits". But at least Harry's out of the house.