"Haru Shirogane", who is cowardly and always bullied, and "Taiko", who comes from the other side of the sea with the goal of becoming the strongest man. Two boys met "Shun Kamiya", the captain of MINATO Live, one evening. At the same time, he was threatened by a huge threat in various concerts scattered in New Tokyo. Under the order of the King of New Tokyo "Ho Tenshin", the Chiyo-san trio led by the mysterious man "Ho Oh Jiro" began to suppress the trios across the country. That evil hand was also preparing to go to MINATO Live.... "I want to change myself" "Aim to be the strongest anyway" "Just, I want to enjoy XB." In order to carry out their belief of never giving in, Haru, Taiko, and Kamiya stood at the batting position of XB-!