The two families of Asakura and Uesugi, who live next to each other, have a close relationship. The baby of the two families, Konan (played by Masami Nagasawa) and the twin brothers Tatsuya (played by Shota Saito) and Kazuya (played by Keita Saito), are good friends who have grown up playing together. Influenced by their parents, the three children have a special liking for baseball. They agreed to walk into the holy land of Koshien together. Entering the adolescence, different feelings sprouted in the hearts of boys and girls. The younger brother Kazuya led the team to advance to Koshien and became a celebrity in the school. Konan served as the manager of the baseball department and guarded his childhood sweetheart every day. The older brother Tatsuya has better baseball talent than his younger brother, but after entering high school, he gave up baseball and joined the boxing department. Who can know the feelings. An accident changed the lives of boys and girls... This film is adapted from the manga of the same name by Mitsuru Adachi.