Doraemon: Stand by Me 2

Nobita Nobi uses Doraemon's time machine to go back in time after reminiscing about his late grandmother. He asks Doraemon to take them to a point in the past when Nobita's grandmother was still alive. The reunion is a heartwarming one, with Nobita's grandmother expressing a desire to meet his future wife. Nobita agrees to help, and they travel to the future to find that his wedding day has arrived, but he's nowhere to be found.