Standing in the shadows of the Sacred Peaks of Grayrope, Lia Frontier prepares to open Pandora's Box once and for all. But Neodada, the Thousand Year Revolutionary Army, is also on the way to Grayrope, ready to unleash their attack on the center of humania! As a thousand years of domination and oppression come to a head, will it be hope or despair awaiting Lia?
Shiki Ichinose's blood is Oni, and his father's is Momotarou. Normally, those with Momotarou blood hunt the Oni--but Shiki's father refused to kill him as an infant. Instead, he adopted Shiki and raised him despite the rebellious attitude and dangerous temper that comes with Oni blood. When a member of the Momotarou Agency kills Shiki's father, he vows to avenge hm. But as Shiki hones his abilities and learns to control his Oni blood, will he be strong enough to survive the dangers waiting for him...?