Doraemon 2023 Sky Utopia (2023, Shin-Ei Animation)

Dekisugi talks about a utopia he read about in a novel where everyone is happy. Thinking this would mean no more tests, school, a place of pure bliss, Nobita decides to go on the hunt for such a place. When he sees a strange object disappear in the sky resembling the utopian island from the novel, he becomes even more determined to seek it...