Is 30-sai no Hoken Taiiku Specials hentai?
English title: A Thirty-Year Old's Health and Physical Education Specials
No
Rated R+ (Mild Nudity) on MyAnimeList and not tagged as Hentai.

Special · 2011 · 3 episodes · R+ - Mild Nudity
Adult Cast, Comedy, Ecchi, Parody, Romance
DVD specials. Episode 1 - 朗読少年 (Lecture Shounen): Macaron's special training by Kuu-chan. Episode 2 - 朗読兄弟 (Lecture brothers): Macaron's special training by his brother Daigorou. Episode 3 - もう一つのエンディング~囚われの安藤なつ~ (Another ending ~ Natsu Andou's imprisonment):
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