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 Asato rule over these powerful entities. After a fierce scuffle against Long-Arm and Long-Leg, Yuru meets their timid master, Kenwho happens to be Dera's half brother! Ken reveals that his father had helped Yuru's parents go into hiding, prompting Dera to contact a shady shaman for more intel on the previous Tadera clan head. Meanwhile, another tragedy is about to befall Higashi Village, courtesy of a swordsman named Ivan Yosano...