Is Taneyamagahara no Yoru hentai?
English title: The Night of Taneyamagahara
No
Rated PG (Children) on MyAnimeList and not tagged as Hentai.

Movie · 2006 · 1 episodes · PG - Children
Fantasy, Kids, Psychological, Slice of Life
Four workers wait out the night around a campfire. Three of them are talking about different things when they start hearing strange noises. Their discussion wakes up a sleeping companion who promptly goes back to sleep only to start having dreams...
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