Everything started in the 22nd century, when Doraemon (a faulty robot) was auctioned to a family suffering from abject poverty. This family, the posterity of Nobi Nobita, suffered dramatically all thanks to the debts which Nobi Nobita left behind to them as his legacy. Nobita's great great great grandson (correct me if I am wrong) decided that there wasn't a way out of this mess, and hence decided to send Doraemon back in time, to 250 years ago, to where Nobi Nobita lived, to help Nobita become a better person. This would ultimately change the future and improve the