Hiromu Arakawa, award-winning manga creator of the best-selling smash hit Fullmetal Alchemist, draws readers into an intricate new web of magic, intrigue, and life-or-death stakes!

In a world where certain humans command mighty supernatural duos called Daemons, it is the birthright of “the children who sunder day and night”—twins Yuru and Asa—to rule over these powerful entities.

Separated from a young age and unaware of the truth of their birth, brother and sister must fight to make their way back to each other, claim their birthright, and save the world...

Ancient Daemons awaken to fight a new battle in an age-old war!!

Dera's surprise arrival at the Kagemori compound breaks the train of dark, somber thoughts running through Yuru's head after hearing about Asa's tragic past. The tense negotiations lead to Yuru making a brash declaration to any hostiles before leaving for Dera's secret lair. Little does he know that a vicious pair of Daemons is lying in wait for him there! The Divine Right and Left take on the ancient Long-Arm and Long-Leg to keep their master alive!