The Devilman starts out genuinely horrifying, demons that look like they crawled out of fever dreams, violence that still holds weight in 1972, but then a woman named Miki ruins everything by being kind to the thing wearing her boyfriend's face, and the show pivots into something that doesn't have a name yet. A demon saves humanity for one person, over and over, each week another grotesque threat that exists only to be destroyed by something that shouldn't exist at all. The episodic churn gets exhausting, but the core premise never does: a monster learning to be human because one human treated him like he could be.
Akira Fudou's life changes forever when a demon takes over his body after an accident in the Himalayas. Instead of becoming a mindless instrument of chaos, something unexpected happens: living with Akira's family changes the demon within him. He begins to care about the people around him, especially Miki, the tough girl who keeps him grounded by literally beating sense into him when he acts out. But this newfound humanity makes Devilman a traitor in the eyes of the demon world. The Demon Lord Xenon sees his defection as betrayal and sends a stream of cruel, grotesque creatures to Earth. Caught between two worlds, Akira must fight to protect humanity without revealing what he truly is. Only he stands between the demons and the end of humankind, and he must keep the city safe while guarding his secret and his soul.