After learning the amazing news from his friend Ryo Asuka, Akira Fudo learned that the demons were about to recover and intend to retake their own world.Faced with the powerlessness and despair of human beings in front of this dark force, Aka made a bold and dangerous suggestion - to merge with the demon.In order to protect the future of the people you love and humanity, Akira resolutely accepted this taboo power and transformed into a "Devilman": an existence that possesses the power of a demon but retains the human mind.In this battle between light and darkness, he not only has to fight against external evil, but also has to stick to the initial tenderness and belief in his heart.