Nobita requests of Doraemon the Moshimo-box and wishes for the world to become a place where the use of magic is possible. Witchcraft replaces science and technology and everyone makes use of it on their daily lives.
Nobita and Doraemon got the small planet in a lottery. In which is blessed with rich nature, they infuse with spirit into their toys by "Screw"of Doraemon's tool, and build "Screw City".