Is T.P. Sakura: Time Paladin Sakura hentai?
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

OVA · 2011 · 2 episodes · G - All Ages
Action
The project is a spinoff from Circus's D.C. Da Capo franchise and features the Yoshino Sakura character as a seemingly ordinary third grader with secret special powers. (Source: AniDB)
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