Is Shukufuku no Campanella hentai?
English title: Blessing of the Campanella
No
Rated R+ (Mild Nudity) on MyAnimeList and not tagged as Hentai.

TV · 2010 · 12 episodes · R+ - Mild Nudity
Adventure, Fantasy, Harem
The story takes place in a trading city Ert'Aria. Leicester Maycraft is an item engineer belonging to an adventurer guild "Oasis." One night, he is at a party with his friends to see a meteor stream on the rooftop of a chapel. One meteor grazes them and hits the steeple of the chapel. There he finds a secret room and a sleeping girl. The girl wakes up and says "You must be my father!" The encounter with the mysterious girl brings an unexpected adventure to Leicester.
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