Nobita's interest in heaven was piqued during a lecture on clouds, prompting him to pose the question to his teacher. Regrettably, his classmates ridiculed him for his inquiry. In his quest to establish the existence of a heavenly realm in the clouds, Nobita enlisted Doraemon's aid, only to be informed of its scientific infeasibility. Notwithstanding their disillusionment, with Doraemon's support, they fashioned their own kingdom in the clouds. To their astonishment, they chanced upon a congregation of cloud-based beings that had taken up residence there for some period.