The story follows Eijun Sawamura, a pitcher who joins an elite school with a brilliant catcher named Kazuya Miyuki. Together with the rest of the team, they strive for Japan's storied Koushien championships through hard work and determination.
[Source: Anime News Network]
OVA episodes bundled with the 44th, 45th, and 46th volumes of the Ace of Diamond manga.
I want to pitch to that mitt again... A meeting with catcher Kazuya Miyuki changed the 15-year-old Eijun Sawamura's life. He said goodbye to all his friends and knocked upon the door of Seidou, a prestigious baseball school, intent on testing his own strength. There, he met many proud baseball players who were betting everything on the sport! A classic tale, yet new and fresh. All the emotion and excitement of the popular baseball manga is at last coming to television in the form of an anime!
[Source: Crunchyroll]
OVAs bundled with 4th and 5th manga volumes of Diamond no Ace Act II.
An epilogue of the Diamond no Ace series.
Picking up the next year after the end of the fall tournament, Seidou High School baseball team battle it out with new and old faces as they begin their tournament run at Koshien.
[Source: MyAnimeList]