Is Monogatari Series: Off & Monster Season - Wazamonogatari: Karen Ogre hentai?
No
Rated R (17+ (violence & profanity)) on MyAnimeList and not tagged as Hentai.

TV Special · R - 17+ (violence & profanity)
Comedy, Mystery, Supernatural, Vampire
Continuation of Monogatari Series: Off & Monster Season.
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