Koh Kitamura is a fifth grader whose family runs a sporting goods store. One of the regular customers of his family’s store is the Tsukishima Batting Center, and so he gets to know the four daughters of the Tsukishima family (Ichiyo, Wakaba, Aoba, and Momiji) very well. Since Koh has spent so much time practicing in their batting cages, he has beco… more Koh Kitamura is a fifth grader whose family runs a sporting goods store. One of the regular customers of his family’s store is the Tsukishima Batting Center, and so he gets to know the four daughters of the Tsukishima family (Ichiyo, Wakaba, Aoba, and Momiji) very well. Since Koh has spent so much time practicing in their batting cages, he has become a genius hitter, but has no knowledge of any other aspect of baseball. This is in contrast to Aoba, who, despite being a year younger, is an adept pitcher and hitter. Wakaba is a classmate of Koh’s, and she seems fully intent on marrying him when she grows up.