Nobita has been plagued by strange dreams recently, and then there is a constant sound under the tatami in the middle of his room. One day, the tatami was knocked open and a creature like a rabbit ran out of it. His name is Chiami and he is the pet of alien boy Roeb. Loeb lives with relatives and friends on a planet called Koyakoya, which is rich in wonderful planktonic minerals. In order to occupy these deposits, the evil planktonic Ore Industry Company did not hesitate to use all kinds of despicable means to drive away the early pioneers such as Loeb. Loeb's spaceship was attacked by the planktonic ore industry, which occasionally led to confusion and connected to Nobita's room. Doraemon and Nobita repaired Robom's spaceship and became good friends with the people of Koya. At the same time, the planktonic mineral industry continues its evil plan, and the kind and upright Nobita is determined to help alien friends defend their homes.
6.6
