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 is an ordinary high school student in Tokyo until his childhood friend Ryo Asuka reappears after saving him from some bullies. Ryo reveals that demons are preparing a war against humanity, and the only way to fight them is with their own power. The two friends end up crashing a nightclub party, where violence sets off a horrifying change as some of the guests turn into demonic monsters. They survive only because a great demon named Amon steps in. Amon possesses Akira, and together they become Devilman, a powerful being whose strength is guided by Akira's deep empathy for other people. Driven by that compassion, Devilman resolves to protect the human race from demonkind. The single OVA mixes action, horror and supernatural fantasy.