Is Moyashimon: Kin Gekijou Deluxe hentai?
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

Special · 2007 · 4 episodes · G - All Ages
Comedy
Five-minute shorts expanding on the "Microbe Theatre" segments of Moyashimon released as bonus episodes on the limited-edition packages of Moyashimon's DVD release.
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