Is Ippatsu Kiki Musume hentai?
No
Rated R+ (Mild Nudity) on MyAnimeList and not tagged as Hentai.

TV · 1999 · 16 episodes · R+ - Mild Nudity
Action, Comedy, Ecchi
Kunyan lives her crazy life of misadventures from episode to episode. This comedy series is accompanied by a narrator who scientifically explains all that happens to her.
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