Akuma-kun

The age of demons has arrived. Dr. Faust predicted this surge of evil, but with his life nearing its end, he can no longer fight it himself. Instead, he passes the duty to a young boy named Shingo Yamada, destined to purge the world of this growing darkness. Faust recognizes a mark on Shingo’s forehead-proof he is the chosen warrior against demons. To aid him, Faust summons humanity’s reluctant savior from hell: a devil named Mephisto, who isn’t exactly eager to help. After sealing their pact in blood to protect mankind, Shingo and Mephisto embark on their mission to confront the supernatural forces threatening the world.