The God-Slaying Demon King 3.

The strongest demon king in history returns from the dead and embarks on a grand adventure to find the god of all demons…and kill him!

Hiram, the strongest demon king in history and ruler over all of demonkind, refused to obey the demon god’s demand for sacrifices. A fierce battle ensued, which ended with Hiram losing his life. Five centuries later, Hiram successfully reincarnates himself as a young human with his magical powers intact.

After an assassination attempt while visiting the Kingdom of Orteville, Hiram uncovers a ploy by the chancellor, who has designs on enhancing his power. But a shocking metamorphosis reveals the chancellor to be nothing more than a pawn being controlled by an old nemesis.