Is Tatakau Shisho: The Book of Bantorra hentai?
English title: Armed Librarians: The Book of Bantorra
No
Rated R (17+ (violence & profanity)) on MyAnimeList and not tagged as Hentai.

TV · 2009 · 27 episodes · R - 17+ (violence & profanity)
Action, Adult Cast, Fantasy, Super Power
In a world where dead people turn into books and are stored in the Bantorra Library where anyone who reads a book can learn their past, Bantorra Library is maintained by Armed Librarians who wield psychic powers and their enemy is a religious society known as Sindeki Kyoudan.
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