A Thunder Dragon boosting unrivaled strength as the strongest swordsman in the organization Narukami. When the Empire's greatest heroes were sealed away, Kagero fell into chaos, so Narukami became the new front-line assault squadron in order to find out a way to free the legendary heroes and prevent the advancing collapse of the empire. Armed with the lightning armament "Ikazuchi Ichinoha", he unleashes his radiant strike "Barbaric Thunder-Break" and destroys all darkness that stands in his path, expelling the anxiety that has run rampant across the citizens of the empire as well as signalling the counterattack of the vanguards of the new era.