After Suneo bragged about owning a ranch, Nobita was pressured to claim he had one. Doraemon won several lotteries for useless planets in the belt between Mars and Jupiter. When Suneo and the others came to see the ranch, Nobita happened to read the last lottery number at the go-any‑where door, which opened a vast dreamlike area. As Nobita’s toy horse frolicked thanks to a wind‑up life gadget, Suneo and the others were intrigued and decided to give their toys the same treatment, letting them live in the area. Consequently, they planned to build their own clockwork city.