Residing among fellow orphans in a shrine, Ouri Kagami is accustomed to death. However, his world is upended when he witnesses his orphanage's caretaker, Keisei Tagami, bring back to life the body of Makina Hoshimura, a schoolgirl with scars. Discovering Makina's true identity as a Shikabane Hime—an undead warrior tasked with eradicating her kind threatening society—Ouri finds himself drawn into a web of mystery. As their unusual encounters escalate, a deep connection forms between them, hinting at a shared destiny that could unravel the enigmatic realm of Shikabanes.