Is Chainsaw Bunny hentai?
No
Rated R+ (Mild Nudity) on MyAnimeList and not tagged as Hentai.

ONA · 2018 · 1 episodes · R+ - Mild Nudity
Comedy, Horror, Supernatural, Suspense
Two bunny girls get in trouble..... From the creator of CHAINSAW MAID and PUSSYCAT, another gory horror clay animation comes!! Never ending splatter carnival has begun!!
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