Is HenSemi (TV) hentai?
No
Rated R (17+ (violence & profanity)) on MyAnimeList and not tagged as Hentai.

TV · 2011 · 13 episodes · R - 17+ (violence & profanity)
Adult Cast, Comedy, Ecchi, Seinen
Matsutaka Nanako is a normal university student, who happened to enroll in an Abnormal Physiology seminar. She tries to keep her mental state sound, but other abnormal classmates start to influence her personality... (Source: MU)
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