Five centuries after his fall, the demon lord Veltol returns to a Shinjuku he no longer recognizes: a neon cyberpunk megacity where magic and engineering fused while demon lords and heroes faded into historical footnotes. Undeterred by his own irrelevance, Veltol sets out to conquer this new world exactly as he once conquered the old one. This manga adapts the Demon Lord 2099 light novel in full.