Hoshino Haru is 15 years old and has a skill system—everything he does in baseball counts. After a year of hard training, he joins Seidou, ready to show what he’s made of. He can play third base or outfield, and although he still has a lot to improve, he’s determined to great things.
Will he be able to reach the long-awaited Koshien? Haru will have to give his all in every practice and game.