Boukyaku Battery follows the journey of a renowned baseball duo, comprising the prodigious pitcher Haruka Kiyomine and the adept catcher Kei Kaname, nicknamed the 'General.'
Once dominant figures in the senior league, their prowess not only led to victories but also dashed the aspirations of many junior high players they faced. However, Kaname loses his memory, and the pair find themselves at Kotesashi High School, a nondescript institution.
Here, they encounter former opponents who had abandoned baseball after facing them in junior high. Together, they embark on a new chapter, forming a baseball club at their school, determined to rediscover the joy of playing the game.