A smoldering tale of romance and revenge set in the world of the New York Times best seller Dawn of the Arcana! Ajin boys who show signs of special abilities are conscripted to serve in the imperial palace as beast-servants—status symbols and shields for their royal masters, to be kept or discarded on a whim. When they were children, Rangetsu’s twin brother Sogetsu was ripped from her arms and sent to the palace to attend Prince Tenyou as a beast-servant, where he quickly fell victim to bloody dynastic intrigues. Now in a world that promises only bitterness, Rangetsu’s one hope at avenging her brother is to disguise herself as a man and find a way into the palace!

As the battle against Rohan wears on, Rangetsu must rely on sheer grit to survive. Eventually her desperation unleashes a new power that gives her the edge in battle. She fights on, striking down foe after foe, lest she lose the country, the friends, and the man she loves. Will she ever see Prince Tenyou again?