Dorabase is set in Tokyo during the 22nd century. The story's protagonist is Kuroemon, a cat robot identical to Doraemon, who serves as the captain and team manager of the Edogawa Doras baseball squad. The manga centers on the Edogawa Doras, chronicling their journey from a team that could not win a single game to a world-class amateur baseball outfit as they confront numerous opponents. Baseball rules remain mostly the same in the 22nd century, with the significant exception that three designated secret gadgets from the main Doraemon series are permitted for use in each match.