The anime is based on the shonen baseball manga written and illustrated by Yuji Terajima. 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. On his journey he meets rivals, friends and learns more “about all this determination and desire to improve.