Position: Second baseman   A member of the prefab team of the Seishū baseball club, two years ahead of Kō. Like Makihara, Sekiguchi didn't get along with Nakanishi in junior high. He retires after the first practice game against the first-string team.   (Source: Wikipedia) 

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.

Cross Game is a moving drama that is heartfelt and true, yet in the brilliant hands of manga artist Mitsuru Adachi, delightfully flows with a light and amusing touch. The series centers around a boy named Ko, the family of four sisters who live down the street and the game of baseball. This poignant coming-of-age story will change your perception of what shonen manga can be.
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(Source: Viz Media)