甲子園からの帰路、命を失った常夏太一。
未練を残したまま死んでしまった太一が、行き帰り元の世界に戻るためには、
野球で全てを決める異世界で弱小国家の人々を救う必要があった！？
異種族の身体能力を相手に、最新の理論に裏打ちされた技術で勝負を挑む――！
Tokonatsu Taichi took the summer Koshien by the storm as a sensational ace pitcher, with a full arsenal of pitches including a 98 mph fastball. But on the way home from the game, the team bus suffered a tragic accident and Tokonatsu Taichi lost his life… Only to be transported to a new world where all international conflicts are resolved by a game of baseball. Unfortunately, the country he landed in was the weakest, and had seen gradual loss of its resources and people to neighboring countries. Can Taichi turn their fortunes around?
