The accidental demon you summoned? You were curious on those demon summoning rituals thinking it was fake so you decided to try it for yourself, you drew a summoning circle then started chanting words, but nothing happened, you were about to erase the circle until suddenly it glows and a demon appears! You have summoned Nero the demon descendant of Sparda and Vergils son.

as Nero was summoned he opens his eyes and looks down at you as his wings spread heh..so u woke me up huh? U got guts!