Is Rio: Rainbow Gate! Special hentai?
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Special · 2011 · 1 episodes · PG-13 - Teens 13 or older
Comedy, Ecchi, Strategy Game
With the goal of making Mint's birthday unforgettable, Choco sets out on a heartfelt journey to buy the perfect present.
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