Dust hangs over the diamond where the sound of a fastball hitting leather once signaled the end of every opponent’s season. Scouts spent years tracking the two titans who dominated the youth circuit, expecting them to be the next big icons of the sports manga world. Instead, the elite stage is gone, replaced by the mundane reality of a public school with no baseball program to speak of. The roar of the crowd has been silenced by a sudden, inexplicable disappearance from the competitive scene.

Haruka Kiyomine remains the absolute powerhouse ace, but his partner has undergone a bizarre transformation. The genius catcher once feared as one half of the "monster battery" has surfaced at this bottom-tier school with a clean slate—and a complete case of amnesia. Kei Kaname has traded his tactical brilliance for a goofy personality, forgetting every sign and strategy that made them unstoppable. As former rivals they once humiliated begin to emerge from the woodwork, Haruka faces an impossible road to redemption. Can this broken duo survive the grind of a public league when the world’s best backstop can’t even remember the rules of the game?

Also known as: Boukyaku Battery, Bōkyaku Batterī, 忘却バッテリー.