Is Anne no Nikki hentai?
English title: The Diary of Anne Frank
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Movie · 1995 · 1 episodes · PG-13 - Teens 13 or older
Drama, Historical
Amsterdam, June 12, 1942. Anne celebrates her 13th birthday and begins her diary, which she calls "Kitty". Hiding for two years from the German threat, the young girl writes about her idealistic views on the world, her ambitions, her fears and her first love, Peter.
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