Nobita Nobi first meets Doraemon after he gets travelled back in time and comes out through Nobita's desk draw. At first, he's very confused and shocked, not even sure that he's still awake but then his great-great-grandson Sewashi, who also taken Doraemon into Nobita's present time himself, explains that Doraemon has come to his time because in the future Nobita grows up into a failed businessman and in turn leaves his decendants with endless financial problems and that with Doraemon's help, Nobita's circumstances will be changed for the better, leaving his descendants with a better future than they had already experienced. Nobita also experience a lot of adventure when Doraemon brings him and his friends to travel through time or finding out mysteries.
Before and somewhat also while Doraemon was around, Nobita's typical day consisted of arriving late to class, scoring zeros on his exam, getting lectured by his teacher, being bullied by classmates Gian and Suneo, being chased by dogs and then getting yelled at by his mom for refusing to do his homework. Nobita will often ask Doraemon to help him with his test or help him get revenge with his friends, Gain and Suneo, which often gang up and bully him.