Obey Me! Nightbringer

You wake up to find a world you once knew...a bit different. The brothers are cold and aloof, and RAD does not exist yet. You find yourself in the Devildom right after the Great Celestial War! Thanks to Solomon, you find yourself masquerading as a demon and as the brand new attendant to the demon brothers. Can you reform your lost bonds with the brothers and return to the world you once knew?!