The theme song is Niji (Rainbow) by Masaki Suda. The film was released in Indonesia on 19 February 2021, Malaysia on 5 March 2021 and Hong Kong on 1 April 2021. The film was then postponed to 20 November 2020 when it was given a theatrical release in Japan. However, due to the COVID-19 pandemic, the film was temporarily removed from the release schedule, and was replaced by Doraemon: Nobita's New Dinosaur (which had been postponed from a previous March release). It was originally scheduled to release in theaters on 7 August 2020.
What takes place, is a roller coaster of emotions, fun and suspense. However, the duo of Nobita and Doraemon is involved in a series of mishaps in the future, as well as the present, in order to fulfill Grandma’s wish of seeing Nobita’s bride. Meanwhile, the Nobita of the future, who is about to marry Shizuka and crown his 'dream of happiness', is seized by a panic attack and flees into the past to see Doraemon again, fearing that he is not the right person for Shizuka. Taken by despair, however, he decides to return to the past to re-meet his beloved grandmother, she died when he was still in kindergarten and to whom he was really fond of grandmother is happy that Nobita came back in time to be with her, and confides in him a great desire: to meet his future bride. Nobita - following his previous adventure - has managed to change his future for the better, making Shizuka marry him.
