Daigo, the son of famous baseball player Gorou Shigeno, feels compelled to honor his father's legacy by becoming an all-star player himself. Fueled by high aspirations, he joins the Mifune Dolphins—the same little league team his father played for—as soon as he enters fourth grade. However, events do not unfold as expected. After just a few initial practices, Daigo's lack of natural talent and baseball instinct becomes apparent, shattering his confidence. Overwhelmed by the pressure of living up to his father, a baseball prodigy, he quits the team in under a year. Two years later, now in sixth grade, a transfer student joins Daigo's class. This newcomer is revealed to be Hikaru, the son of Gorou's lifelong friend and fellow baseball star, Toshiya Satou. One day, Daigo's mother receives a call from the Dolphins asking for players for a game, and she insists that Daigo attend. To Daigo's surprise, he encounters Hikaru there. Even more startling is the fact that, despite his father's profession, Hikaru has never played baseball before! In contrast to Daigo, Hikaru quickly grasps the game, displaying excellent performance. It goes without saying that Daigo and Hikaru are complete opposites. Yet, this friction will inevitably push both of these inexperienced boys into the world their fathers hold dear—the world of baseball.