Year 2055, 4 years after the events in Danball Senki W. LBXs have become the world's largest hobby, big enough for pro leagues to be established, and people to make their entire living off being LBX players. 14-year-old Arata is a new transfer student at Kamui Daimon Integrated Academy on Kamui Island near Japan, known to be the most prestigious institution in the world for…