Ace of Diamond Act II

Koshien Stadium stands as the “field of dreams” for high school baseball, and Seidou High has finally reclaimed a place there after winning last year’s autumn tournament—returning to the national stage for the first time in seven years. With the spring tournament behind them, their sights turn to the ultimate proving ground: the Summer Koshien, where the nation’s best is decided.

As the third-years approach retirement after summer, Seidou must blend the seniors’ hard-earned experience with the promise of new talent to push past both familiar rivals and fresh challengers in pursuit of a national championship. At the center of it all, Eijun Sawamura remains fixated on earning the coveted No. 1 jersey and taking the ace role from Satoru Furuya, their ongoing duel driving the team forward as they chase glory and the title of true “Ace of the Diamond.”