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!!

After a fierce scuffle against Long-Arm and Long-Leg, Yuru meets their timid master, Ken-who happens to be Dera's half brother! Ken reveals that his father, the previous Tadera clan head, had helped Yuru's parents go into hiding. But much to Yuru's dismay, Ken doesn't even know the whereabouts of his own family anymore. Meanwhile, another tragedy is about to befall Higashi Village, courtesy of a swordsman named Ivan Yosano...