Ookiku Furikabutte: Natsu no Taikai-hen

Picking up where the original series left off, Ren Mihashi, the ace pitcher of the newly-formed Nishiura High School baseball team, and his teammates face the Sakitama High School team in the next round of the High School Baseball Invitational Tournament as they aim to play in the finals at legendary Hanshin Koushien Stadium.
(Source: Anime News Network)