The royal family stands at the top of the monster hierarchy. Hime, a member of the royal family, is in a fight with her siblings to inherit the throne. Hiro, a young boy who became immortal after taking Hime’s blood, accompanies her as a blood warrior. In the royal battle for the throne, chaos reigns, and strategies, alliances, and ulterior motives intertwine. And when Hime finds herself in danger amidst the fight, Hiro’s abilities as blood warrior are awakened.