Is Smile Precure! Movie: Ehon no Naka wa Minna Chiguhagu! hentai?
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

Movie · 2012 · 1 episodes · G - All Ages
Mahou Shoujo
The movie transports the Precure into a world inside a picture book, where they are guided by Nico, a mysterious inhabitant of the picture book world.
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