Sekai de Ichiban Tsuyoku Naritai!

Sakura Hagiwara is a pop idol and member of the idol group Sweet Diva. One day, however, a female wrestler named Rio Kazama beats up Elena Miyazawa, a fellow Sweet Diva member and Sakura's rival. To avenge Elena, Sakura is introduced to the Berserk Wrestlers team, of which Rio is a part of. Eventually, Sakura proves to be a natural athlete with potential and joins the team.