Is Tengen Toppa Gurren Lagann Movie 1: Gurren-hen hentai?
English title: Gurren Lagann The Movie: Childhood's End
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Movie · 2008 · 1 episodes · PG-13 - Teens 13 or older
Mecha, Sci-Fi
Animation studio Gainax presented a website for the release of a movie adaptation of the Tengen Toppa Gurren Lagann TV series in the fall of 2008. Both the original director and series script editor will return to work on the new project. Gainax will also be hosting four events to celebrate this occasion at this year's Tokyo International Anime Fair, featuring voice actors from the anime.
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