The year is 2055, four years after the events of Danball Senki W. LBXs have grown into the world’s biggest hobby, significant enough to support professional leagues and allow people to earn their entire living as LBX players. Fourteen-year-old Arata is a new transfer student at Kamui Daimon Integrated Academy, located on Kamui Island near Japan. Recognized as the most prestigious institution globally for training LBX players and mechanics, admission to the academy demands clearing an extremely competitive barrier: winning at least three official tournaments. Alongside other members of his platoon, he confronts rivals and uncovers the secrets hidden within the academy.