Saikyou! Toritsu Aoizaka Koukou Yakyuubu. Six years ago a group of friends vowed after a painful defeat that they will one day take their friend Suzuo to the Koshien. Now in their first year of high school, the friends have reunited behind the pitcher Kitaro Kitaoji to keep their promise. With Suzuo as their boss and the left-handed, underhand signature of Kitaro's "Submarine Pitch," they the just go all the way.