For thirty years, Kai Miyagusuku has kept the ghosts of the Chiropteran War locked in the basement of the Omoro restaurant.
To the world, he is just a single father raising his son, Ren, alongside his two adopted teenage nieces, Rika and Aria. But Kai’s quiet life is built on a devastating lie. In their veins flows the blood of Diva—the chaotic, terrifying Chiropteran Queen who nearly brought the world to ruin.
Kai has sacrificed everything—including his own marriage—to keep the girls' true nature a secret, hoping to give them the human life their mother never had. But peace is a fragile thing.
When a war-weary Saya Otonashi finally returns to Okinawa, desperate to begin her decades-long hibernation, the fragile illusion shatters. A broken lock leads Rika and Aria to the dark, classified truth of the Red Shield. In an instant, the loving family that raised them becomes the enemy who slaughtered their mother.
As bitter betrayal triggers the terrifying, dormant powers hidden within their Queen biology, the Miyagusuku family is pushed to the breaking point. With time running out before Saya must sleep, Kai and the Queen must face the consequences of their thirty-year lie. Can they save Diva’s daughters from the curse of their own bloodline, or will the sins of the past finally consume the Omoro?