Shigeno Daigo can be. Inspired by his dad, that was once a Major League player, Daigo started playing baseball a youth team, with an Mifune Dolphins. He was not able to fulfill the expectations to be the kid of a specialist, and cease baseball year. Subsequently, in the spring of his sixthgrade year, Daigo's school welcomes a move student, Sato Hikaru, whose dad has been Sato Toshiya, a former Major League player and Goro friend. The fate of these two teenage boys begins to move!