Is Terra Formars: Bugs 2-hen hentai?
No
Rated R (17+ (violence & profanity)) on MyAnimeList and not tagged as Hentai.

OVA · 2014 · 2 episodes · R - 17+ (violence & profanity)
Action, Gore, Horror, Sci-Fi, Seinen, Space, Survival, Suspense
Adaptation of the Bugs 2 arc of the manga.
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