Full of Nobita

Doraemon picks up a call from Shizuka, who invites Nobita to taste her cake. Nobita excitedly runs back to his room, where he finds Doraemon talking to Mii-chan. Doraemon returns from the dorayaki sale, and Nobita is shocked to find two Doraemons appearing at the same time. Doraemon reveals that he used the Tuning Fork that duplicates the user by the separation of atoms, but reduces both of their weight by half. When Nobita's uncle and his mischievous son, Akiyo, visit Mom and Dad, Nobita lends the Tuning Fork from Doraemon to get pocket money from Uncle and be at Shizuka's house at the same time. He lets the other Nobita go to Shizuka's house while he tries to collects the money by being filial to Uncle.

Nobita takes Akiyo to the park to play, and runs into near encounters that could have harmed Akiyo. He meets Nobita there, who earlier praised Shizuka for the almond cake and is now playing volleyball with her. He agrees to bring Shizuka back home over Nobita's concern of two Nobitas appearing at the same place at the same time. Nobita is engrossed talking to Nobita that he forgot about Akiyo, who could have met with an accident wandering away. He duplicates himself into four (making each one-eighth his original weight), and they split up to find Akiyo.

During the search, Gian is irritated by Nobita asking for Akiyo's whereabouts and beats him up. Nobita bumps into Nobita, who had just came out from Shizuka's house, and tells him Akiyo is missing. Nobita informs both Nobitas that Akiyo is found and they rush to the playground to save him. Nobita falls down trying to save Akiyo, and is rescued by the other four Nobitas. Akiyo is surprised to find the five Nobitas and falls down, landing on the Nobitas as a result. Nobita absorbs himself back and brings Akiyo home, and learns Uncle had left urgently. Mom and Dad let Akiyo stay for the night, to Nobita and Doraemon's displeasure.