The year 2099 of the Fused Era—

It has been five hundred years since the Demon Lord Veltol reigned over an immortal nation.
And now, the time has come for the Demon Lord to awaken once more.

In the cyberpunk city of Shinjuku, gigantic skyscrapers pierce the heavens as a vivid conglomeration of neon lights adorn them—revolutions in the field of arcane-engineering have produced a period of unprecedented advancement, resulting in the ultimate futuristic metropolis.

The world in which the Demon Lord finds himself arisen has achieved supreme evolution, leaving its old supreme ruler a relic of the past.
It now looms as a massive city-state, a glorious achievement.
And yet… terrifying darkness dwells beneath the surface.

Thus, in order to conquer the dazzling but dangerous new world in which he finds himself, the Demon Lord begins to shake the future!