A burglary job spirals into something that rewires the entire world in forty minutes. The pacing doesn't give you time to ask questions, which is exactly the point: you're running alongside Shido, drowning in reveals that contradict everything you thought you knew. The action sequences are drawn with real weight, the opening theme hits like a hammer, the ambition is staggering, and then it ends before you can catch your breath. For viewers who prefer velocity and spectacle over coherence, this OVA moves like nothing else.

Humanity's world stands fractured by a colossal barrier, a desperate measure against the creeping plague known as Dark mist. A century and a half after the fog swallowed half the planet, walls some 3,000 meters high divide the world, and the surviving half of humanity lives in artificial cities called Arks. Shido Enishi, one of the few Japanese people left alive, runs a detective agency on the ninth Ark. When he is hired to catch a burglar, the job looks simple. Chasing the suspect instead leads him to a vast conspiracy, possibly linked to the Rivigarudo syndrome, an illness that is turning its victims into something no longer human. The single action OVA came bundled with a light novel volume.