Is Baka to Test to Shoukanjuu Specials hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Special · 2010 · 6 episodes · PG-13 - Teens 13 or older
Comedy, School
The candid shots of Muttsurini's female and male classmates that fund his surveillance habits.
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