Tama wants to save humans even though she's a monster, Jinka hates them even though he's half-human, the show builds everything around characters who are fundamentally at war with what they are, not just external enemies. The first few episodes drag while it figures out who these people actually need to be. Once it does, the emotional weight stops being theoretical and starts breaking you, especially when it finally shows you why Jinka became what he is. By the end, every fight matters because you understand what each person is actually fighting for.

The world is split between humans and monsters known as katawara. Tama is a katawara, yet she loves humans and swears to shield them from evil, even when that means turning on her own kind. Jinka, her brother, is mostly human but despises humanity. Tama can lend her powers to Jinka through a special ritual, and together they roam as vigilantes who strike down wicked beings, whether katawara or human. They are joined by Shinsuke, a timid swordsman who hopes to learn how to become strong. On their travels the group discovers that monks are carrying out cruel experiments on spiritually gifted people, trying to create human and katawara hybrids. The companions resolve to stop whoever is behind the scheme, even if it means facing an entire army. Along the way they rescue Shakuyaku, a girl taken for the experiments, who travels with them. The series is an action fantasy adventure adapted from a manga by Satoshi Mizukami.