You watch three episodes of pure animation flex where two witches hunt invisible dragons in a London nobody else can see. The action flows like someone unlocked a frame rate most shows don't even attempt, each spell and strike snapping into place with zero wasted movement. It's gorgeous enough to make you forgive that the story barely has time to breathe, that the world-building gets steamrolled by the spectacle. But that's the point: this isn't trying to be Bleach's narrative successor. It's proof that sometimes a studio just wants to show you what they can do, and when they're this good, three episodes is all they need.

London has a hidden problem: dragons, unseen by nearly everyone, account for 72% of the deaths in the city. Only the residents of Reverse London, a mirror side of the city, can see them, and only a chosen few qualify as witches or wizards who deal with them directly. Noel Niihashi and Ninny Spangcole are a witch pair working as protection agents for Wing Bind, a group charged with managing dragons and keeping the people of both Londons safe. Ninny also belongs to a popular girl group. Alongside their regular duties, the two guard Balgo Ywain Parks, a young man with a strange link to dragons. Wing Bind has kept fatal dragon attacks away for nearly a hundred years, but Balgo's presence sets a Dark Dragon loose on the city. Things get worse when Ninny's troublesome former bandmate turns up in Reverse London along with another powerful dragon. The action fantasy ONA runs three episodes and adapts a one-shot manga by Kubo Taito.