Boukyaku Battery

Synopsis

The baseball manga follows Haruka, a strong pitcher praised as perfect, and Kei, a skilled catcher known as the "General" who has lost his memory due to amnesia. The talented pair were hard to defeat in junior high, and they crushed other players' dreams. They both enroll in the no-name Kotesashi High School in Tokyo, where they encounter other baseball players who had quit after losing to Haruka and Kei.

Synopsis & details from MangaUpdates