In the original Devilman and in Crybaby, Ryo definitely loves Akira, who in turn definitely loves Miki. That said, Akira is still very affectionate towards Ryo in both the manga and the anime. It's possible that Ryo might have had a chance, but he completely squandered it. There's a sequel to Devilman, though, with Ryo and Akira, and in that it's sort of unclear if Akira loves Ryo back. I'm.