Devilman: Youchou Sirene-hen

Akira Fudou has survived becoming Devilman, retaining a human heart inside the terrifying power of the demon Amon. That balance grows harder to maintain as demons close in on the people he cares about, forcing Akira to answer brutality with a violence that increasingly resembles the creatures he hates.

His battles lead him first to Jinmen, a grotesque demon whose victims remain embedded in his shell, and then to Sirene, a proud and lethal winged demon determined to destroy Amon's human host. Against enemies that attack both his body and his humanity, Akira must decide how much of the demon within him he can unleash without losing himself.