5th grader Koh Kitamura lives next door to the Tsukishima family, owners of a batting cage and the Clover cafe. His girlfriend, Wakaba, is the 2nd Tsukishima daughter; the 3rd daughter, the baseball prodigy Aoba, can’t stand him. Wakaba dreams of Koh pitching at legendary Koshien Stadium, site of the national high school championship finals. However, tragedy strikes, and it is up to Koh, with the help of Aoba and his other teammates, to make Wakaba’s dream come true,
The main character is Kou Kitamura, son of the owner of Kitamura Sports. In the same neighborhood is a batting center run by the Tsukishima family. Due to their proximity and the relationship between their businesses, the Kitamura and Tsukishima familes have been close for many years, with their children going back and forth between the two homes like extended family. Because Kou and Wakaba were the same age and always together, Aoba was jealous of all the time Kou spent with her older sister. Aoba is a natural pitcher with excellent form, and Kou secretly trains to become as good as she was, even while publicly showing little interest in baseball.
When Koh was eleven years old, he lived a quiet and peaceful life, delivering sporting goods for his family’s store and batting frequently at the Tsukishima Batting Center. Though Koh had no interest in baseball, he started the play the sport anyways after a series of events, much to the delight of his best friend, the beautiful Wakaba Tsukishima. However, soon life dealt Koh a tragic turn, changing him forever. Now, years later, Koh attends Seishuu Academy and is soon pulled back into the world of baseball. Alongside Wakaba’s talented sister, Aoba; old friend and fighter Nakanishi; and plenty of new teammates and companions, Koh will once more pick up the pitcher’s mitt and see if he has what it takes to be a champion.