Forty-something minutes and it still leaves a mark. This is the version that plays Go Nagai straight: no irony, no cleanup, just Ryo Asuka dragging his gentle friend Akira into a candlelit Sabbath and opening throats with a broken bottle until the demons come out of the dancers. The animation is 1987 at full budget, hand-drawn body horror that swells and splits in ways modern digital work rarely bothers with, and the score turns the Amon fusion into something closer to a birth than a fight. Yes, the exposition sags, Ryo explains the demon war for longer than anyone needs, and some of the dialogue lands sideways. Nobody remembers that part. They remember the wings unfolding and the fact that the thing wearing Akira's face is still crying.
Akira Fudo lives an ordinary life in Tokyo until his childhood friend Ryo arrives with terrifying news: demons are preparing to invade Earth. Humanity has no defense against creatures that exist beyond human comprehension, and only one solution remains possible. To fight demons, they need demon power itself. Ryo convinces Akira to undergo a forbidden ritual that will merge him with a demon, granting superhuman abilities while keeping his human consciousness intact. The gambit works, transforming Akira into Devilman, a being caught between two worlds. He becomes humanity's unexpected champion, wielding demonic strength to protect the people who don't even know why they need saving. But merging with a demon comes with a cost. Akira must constantly battle the monster inside himself, questioning whether he's truly in control or slowly being consumed. As the demon invasion draws closer, he discovers that saving humanity might require sacrificing his own humanity. The line between savior and monster becomes dangerously thin.