Doraemon is a robot cat from the 22nd century, he was sent by one of his descendants named Nobita in the future to help Nobita Sewashi now that Nobita become a better person for the future Nobita descent living in poverty and distress due to debts created by Nobita.
Doraemon future task is to help Nobita to succeed and gain success in school and future career so that the offspring can get a better life and not be trapped in poverty anymore.