Is Yuru Yuri Nachuyachumi!+ hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

TV Special · 2015 · 2 episodes · PG-13 - Teens 13 or older
CGDCT, Comedy, Gag Humor, Girls Love
Extra episodes of Yuru Yuri Nachuyachumi! Summer vacation is drawing to a close, but the Amusement Club members make the most of the last days. Between outdoor activities in the sun, reminiscing on their recent camping trip, and a sleepover, the members of the Amusement Club, and their classmates in the student council, continue to make summer memories.
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