The world is divided into two factions: humans and monsters called
katawara. Despite being a katawara, Tama loves humans and vows to
protect them from evil, even if it means fighting her own kind. Her
stepbrother Jinka, however, hates humans, despite mostly being one. The
siblings are joined by a swordsman-in-training named Shinsuke and a
human-katawara experiment named Shakugan.
After angering the Dangaishuu, a group of spiritual warriors
experimenting on humans to turn them into katawara, Jinka is being
pursued by their four beast leaders. Will he be able to stop all four
powerful leaders and keep his new companions safe?