Is Sekai de Ichiban Tsuyoku Naritai! hentai?
English title: Wanna Be the Strongest in the World
No
Rated R+ (Mild Nudity) on MyAnimeList and not tagged as Hentai.

TV · 2013 · 12 episodes · R+ - Mild Nudity
Combat Sports, Ecchi, Sports
Hagiwara Sakura and Miyazawa Elena are the leading members of a popular idol group, Sweet Diva. One day, Elena is injured by the attack of a female pro-wrestler Kazama Rio during the recording of a TV program. Sakura gets mad at Rio and gives her a dropkick. To avenge Elena, Sakura enters the female pro-wrestling matches.
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