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!!

Daigo and Sadomasochist have Hana and company on the ropes until a mysterious masked man arrives to turn the tide, convincing the Daemon Wielders from Nishino Village to beat a hasty retreat. Later, Asuma encounters father-son duo Roei and Ryu at the Taderas' Lost House. Learning of their common enemy, he proposes the unthinkable: an alliance between the Kagemori clan and Higashi Village!