the eminence in the shadow

A boy named Cid Kagenō, a person who has always looked up to the heroes that work in the shadows of society. In an "unfortunate" accident, he is reborn in a world of magic, so he uses his vast knowledge of martial arts and training discipline to become a power in the shadows. With the members of Shadow Garden, he unwittingly works to stop the Order of Diabolos and their diabolical plans.