HLB stands for "Hero League of Baseball"- it is a baseball league founded by pro-heroes who love baseball! It's game day! The last game of HLB championship is between Gang Orca and Shishido's two rival agencies. They form a team ("Orcas" and "Lionels") to compete. In the world of HLB, there is no rule - using their Quirks is of course accepted; however, just when the game is about to finish, they are interrupted by a villain. Who will be the winner of HLB?!