Is Kuroshitsuji Recap hentai?
English title: Black Butler: The Story Thus Far
No
Rated R (17+ (violence & profanity)) on MyAnimeList and not tagged as Hentai.

TV Special · 2009 · 1 episodes · R - 17+ (violence & profanity)
Action, Comedy, Historical, Mystery, Mythology, Shounen, Supernatural
A recap episode of the first half of Kuroshituji told by Tanaka-san, aka episode 13.5. Including this recap episode, the series is 25 episodes long.
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