Princess Nine: Kisaragi Joshikou Yakyuu-bu

Keiko Himuro, Chairman of the Kisuragi School, puts together an all-girl baseball team led by Ryo Hayakawa, daughter of a legendary pitcher, in hopes of proving that girls can compete just as well as boys. Their goal: Koshien Stadium, where only the best teams get the opportunity to play.
(Source: Anime News Network)