Is Mashiro-iro Symphony: Airi ga Anata no Kanojo ni!? hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Special · 2012 · 1 episodes · PG-13 - Teens 13 or older
Harem, Romance
An alternate ending to the anime with Airi being the chosen girl. This is not animated in a normal anime fashion, it is more of a gal game animation.
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