Nobita is a young boy who cannot make a success of anything he does. One day, his great-great grandson, Sewashi, and a cat-shaped robot from the 22nd century appear before him. They tell him about his future and that of his descendants. According to their story, Nobita not only fails to get a job after graduation, but goes bankrupt after he tries and fails to make his own company. His descendants are then burdened with the enormous debt he leaves behind.
Though Sewashi brings Doraemon with him to the future to act as Nobita’s tutor, Doraemon seems less than enthusiastic. So, Sewashi sets in place the “accomplishment program”, by which Doraemon won’t be able to return the 22nd century until he helps Nobita achieve happiness in life.
Despite Doraemon’s initial reluctance to live with Nobita, they gradually open up to one-another and become close friends. Then, in order to help Nobita become happy, Doraemon tries to bring him together with his crush, Shizuka, hoping that they will get married in the future.