Stand By Me Doraemon
The first day the boy Sewashi -4th descendants of Nobita from 22th century- traveled through time machine and carried a functional robot to help people by secret things. Sewashi said that the whole family suffers from Nobita's debt. So Sewashi brings Doraemon to help Nobita. Since that, Nobita lives more happily. What will happen to Nobita's life after Doraemon leaves ?