Is 6♥Princess hentai?
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

Music · 2013 · 1 episodes · G - All Ages
Music
"6HP" is a magical girl animation produced by Murakami's Ponkotan studio and features character designs by mebae. "6HP Six Hearts Princess Pink or Black" is a promotional video for the series cosmetics, created by Shu Uemura. Music is by livetune and vocal is by Hatsune Miku.
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