Wanna be the Strongest in the World was a 12-episode ecchi sports series that aired from October 6 to December 22 of last year and was animated by Studio Arms. It is based on the ongoing shounen manga series written by ESE and illustrated by Kiyohito Natsuki for Comic Earth Star magazine since December 2010.
Sakura Hagiwara is a 17-year old pop idol who is the lead vocalist of the idol group Sweet Diva. She impulsively decides to enter the world of women's professional wrestling to avenge the beating that one of her members took at the hands of a wrestler.
Like you would expect out of many Studio Arms titles, Wanna be the Strongest in the World's sole purpose of existence is to pander to otaku and ecchi fans with its desperate attempts to get gratuitous shots of T&A out of much of its female cast. A good amount of these shots come from submission holds that get applied to female wrestlers during their matches and the camera offering up-close shots of boobs, crotch and butt, as well as the occasional shower scenes and random service shots.
Outside of its desperate attempts to milk T&A, there's little else to get hooked into with this series. The pro wrestling element of its premise is lazily implemented as the first half to the series is quite painful to press through with Sakura's ridiculous losing streak she racks up and losing to the same submission hold in each match. The second half gets slightly better with Sakura being more competent in her in-ring ability, though the in-ring action still borders on ridiculous with a good chunk of action reserved to submission holds for the mentioned T&A shots and some wrestling maneuvers shown at camera-angles that are supposedly painful to look at (with moves like piledrivers and powerbombs that cause harm to the head, neck and back). However with the latter, the wrestlers are conveniently able to get back up to their feet like a shounen action hero refusing to stay down when just about crippled or near-death.
Don't go expecting to connect with the characters in this series either as they are mostly paper-thin archetypes and have little in the way of depth or dimension to make them relatable to more than just otaku and ecchi fans.