Devilman

Since merging with the demon Amon and becoming Devilman, Akira Fudou has wrestled with his human emotions and the brutal instincts of his new form. But when other demons take notice of him and begin terrorizing the people he loves, Akira has no choice but to fight back with everything he has. Facing opponents like Jinmen, a monstrous turtle with human faces trapped in its shell, and Sirene, a deadly winged demon, Akira must push himself to the limit just to survive.