Synopsis: Dungeon Battle Royale

God launched the "World Salvation Project" in the year 20XX to rescue humanity from an imminent demise. As a component of this mission, Shion Kurosaki, a collegiate battling the obstacles of a broken universe, was selected as the demon king. While shielding his dungeon from the self-proclaimed hero's assault, a clash of power erupts between Shion and several other demon rulers competing for supremacy.