Set in a different Tokyo on a different world than ours, the story follows Tokunana, a unit of assembled misfits in the Metropolitan Police Department. Tokunana battles against “Nine” — an organization commiting crimes in their zealous worship of the dragons that once roamed the world. (Source: Anime News Network)

Episode 0.5 included in the second Blu-ray volume. The episode focuses on Kujaku Nijou, when he first joined the team, one year before the anime begins.