Naraku no Adu

Adu is one of twelve powerful Demon Kings who, through a pact with an angel, has taken human form in the real world. As part of the agreement, he must hunt down and eliminate the remaining Demon Kings. Despite his strength, his human transformation weakens his demonic powers. The story follows Adu as he attempts to destroy the other Demon Kings and safeguard humanity, while concealing his true nature from those around him. The first volume includes the prologue.