A several years ago the war have been triggered in many years between the darkness side of the world and the royal side of the world. 

It left with many tragedy, people, places, things are all lost to large dimensional location that in unknown current state. Leaving only magic system of it. It is possible to someone to resurrect the world. 

After a few years later, the Royal Sacred King clan that been born in other world decided to ressurect back the world with technology and magic that the world left but it's failed the war triggered back with the conflict that begin out of blue. 

Then, the new world called Lumiere, was built under the ancient world with new rules and Bureau who controlled some part of the planet that didn't make the trigger of the war. 

They also know that the war will begin in no time, so they decided to create a new magic system based on the ancient system that more powerful than the original one. They also make the devices that only could be given to the real owner that shared the Mana Soul together. The devices only active when the darkness is approaching to the world. 

When, the darkness side of Leviathan planet was resurrected back with new power system called Modern Levy. The dark ruler, King Phantom wanted to defeat the new magic system and built the darkness to all the world with the shadow system in beyond of it. 

The devices are activated and search for the powerful master that can fight the evil.