Half a millennium ago, the realm of Alneath shattered in a clash between immortal sorcerers and mortal warriors wielding enchanted relics. The strife ended when the mortal champion Gram defeated the Demon King Veltol Velvet Velsvolt. By 2099, reality had shifted; Alneath merged with a highly advanced Earth in an event called Fantasion. Immortals dwindle to almost none, while mortals gain spell‑casting through technological grafts known as Familia.
In the world"s gradual healing, Veltol's subordinate Machina Solege brings him back to life within Shinjuku—a cyber‑magical metropolis rising from ruined terrain. Yet Veltol"s power is greatly diminished, and his erstwhile ally Marcus has turned traitor. Seeking to reclaim renown and arcane prowess, Veltol heeds Takahashi—Machina"s associate and a seasoned hacker—to launch an unconventional venture: live streaming. His biting wit and hilariously inept gaming quickly attract a fanbase, but to seize global dominance again, Veltol must first unveil Shinjuku"s hidden truths and stop Marcus" sinister schemes.
