Is Onkyou Seimeitai Noiseman hentai?
English title: Noiseman Sound Insect
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

Movie · 1997 · 1 episodes · G - All Ages
Action, Fantasy, Sci-Fi
The film is set in the distant future in a city called Cahmpon. A scientist creates a synthetic life-form called Noiseman, which erases music from the airwaves by turning it into crystals. A group of Biker street kids rebels against this tyranny. (Source: ANN)
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