Stand By Me Doraemon

In the suburbs of Tokyo some time ago, there liverd a clumsy boy about 10 years old. There appeared in front of him a boy named Sewashi Nobita's descendant of four generations later from the 22nd century, and Doraemon, a 22nd century cat -type caretaker robot who helps people with its secret gadgets. Sewashi claims that his family is suffering from debts Nobita made even to his generation, so in order to change this disastrous future. He brought along Doraemon as Nobita's care-taker to bring happiness to his future, although Doraemon is not happy about this. And so Sewashi installed an accomplishment program into Doreamon forcing him to take care of Nobita. Unless he makes Nobita happy, Doraemon can no longer go back to 22nd century. This is how the life of Doraemon and Nobita begins. Will Doraemon succeed this mission and return to the 22nd century?