山田太郎在中学放弃了棒球，升入了棒球无名高中。在那里，与曾经打垮自己的中学最强的投捕组合——清峰叶流火、要圭相遇。但是，这所高中应该没有棒球部。而且圭好像丧失了记忆……⁉

虽然圭依旧拒绝打棒球，但他以叶流火的交易为借口，不情愿地进行击球练习。另一方面，与山田同样被最强投捕组合打碎了棒球梦的藤堂葵和千早瞬平，被那个景象惊愕——！

为了加深和藤堂、千早的关系，圭邀请他去自己家。在那里，叶流火看到藏在床下的捕手手套。在各自面对“无法舍弃的东西”的时候，与名门帝德高中的练习比赛决定了——！

叶流火的投球让帝德击球手无所适从，瞬间被三者三振。进攻时，藤堂打出阳春炮。所有人都屏息注视，与叶流火和圭曾经的队友天才击球手国都的对决！

赛后，叶流火、圭、藤堂、千早被帝德的教练挖角。让三人上垒的圭意识到比赛因为自己输了。藤堂和千早为转校邀请而烦恼。然后早早离去的叶流火。每个人的回答是……？

棒球是什么？为了帮助烦恼的圭，大家决定在藤堂家举行学习会。虽然受到藤堂漂亮的姐姐和可爱的妹妹的冲击，圭还是以纯粹的心情学习棒球。另一方面，藤堂坦白自己有着某种问题…！

Todo volunteers to step down from shortstop due to his yips. But inspired by Kei's words, Todo decides to try practicing throwing to first. However, when his training hits a snag, Haruka says something that could ruin everything.

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