One morning, Nobita stumbles upon mysterious events on the Moon and excitedly shares his discovery with classmates, claiming it was the work of the Moon Rabbit, only to be met with skepticism. Determined to prove his theory, Nobita's attempt at replicating rabbit behavior ends in a mishap with his teacher. Seeking aid from Doraemon, who reluctantly deploys the 'Divergent View Badge' gadget, they create a lunar environment and encounter Moonbit using animal clay, leading to an extraordinary journey back home. Subsequently, tasked with gathering Susuki grass for a Moon Viewing Ceremony, Nobita glimpses a boy who vanishes abruptly, leaving him perplexed. The following day, the arrival of a new student named Luca shocks Nobita as he recognizes him as the enigmatic boy from the previous day.