Two summoning circles, a lonely boy, demons, angels, and a newly FUBAR fate. This will screw up many plans. (description and rating to change) HP/oc/oc
After finally reaching adulthood, Etna and Flonne decide to take a "vacation" to escape Laharl's tantrums. They crashland in the Dursley's backyard, and witness the abuse of a little boy...And, suffice to say, they're none too pleased about it.
After Cedric's death, Harry and company summon a demon to kill Lord Voldemort. Except, well, when the hell is summoning a demon ever turn out just the way you planned?