Is Cyborg 009 VS Devilman hentai?
No
Rated R (17+ (violence & profanity)) on MyAnimeList and not tagged as Hentai.

OVA · 2015 · 3 episodes · R - 17+ (violence & profanity)
Action, Mythology, Sci-Fi, Shounen, Super Power, Supernatural
After discovering the existence of demons in Tokyo, the original Cyborg crew led by Dr. Gilmore find themselves in conflict with Devilman, a strong demon believed to be in league with the war-profiteering terrorist organisation, Black Ghost. Meanwhile, a bigger threat emerges when Dr. Adams, a Black Ghost scientist unleashes his new line of high teen Cyborg models against 009 and his friends. (Source: ANN)
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