Five centuries after his defeat, the demon lord Veltol is brought back by reincarnation magic and wakes in Shinjuku: a cyberpunk megacity where magic and technology have fused into something he barely recognizes. Set on ruling the world all over again, he is met instead by his vassal Makina, one of the Six Demon Marquises, who greets him with a fact he never saw coming. This manga adapts only the opening chapters of the light novel before its run ended early.