Tokyo's streets exist in two states at once, one for humans, one for demons nobody can see. A crow-masked enforcer named Karas keeps the balance, but the job is becoming impossible. The OVA's 3D action is genuinely disorienting in the best way; it moves like nothing else from 2005, all violent momentum and spatial weight. This is cyberpunk surveillance paranoia fused with yokai mythology, a six-episode fever dream that respects both halves equally. Yurine and Karas are the only thing holding the world together, and you watch them barely hold on.
Two worlds occupy the same space: one where humans live their ordinary lives, another where demons move unseen alongside them. A mysterious woman named Yurine and her dark guardian, the Karas, have spent centuries maintaining this precarious balance, using violence when necessary to keep the supernatural at bay. Humans remain oblivious to their protector's sacrifice, having forgotten that demons ever existed at all. That protection shatters when the previous Karas, now called Eko, abandons his duty. Bitter at humanity's indifference and arrogance, he transforms into a man and begins crafting an army of hybrid creatures, machines infused with demonic power. His plan: flood the human world with chaos and force people to remember what they've taken for granted. Yurine summons a new Karas to counter this threat. Armed with a transforming motorcycle and overwhelming combat ability, this crow-masked warrior must hunt down Eko's creations while confronting a harder question: is humanity worth saving if they don't even know they're in danger? Stylish action and dark urban fantasy collide in this six-episode reckoning.