Synopsis: “What if we could use magic?” The day after Noby makes a wish in the “What If? Box,” the world is transformed into a magic world. The sky is filled with flying carpets, magic rays shoot out of Mom’s fingertips as she prepares breakfast, and students learn how to make objects float at school. Later, Noby and Doraemon meet Dr. Fullmoon and his daughter Luna. Dr. Fullmoon, a magic professor, believes Devildoom is approaching and that the end of the world is near. Dubious, Noby and Doraemon visit Dr. Fullmoon again the following day, only to discover that his mansion has vanished. That night, capturing the light from the moon, the strange cat that has been following Noby around is transformed into a human – it is Luna, Dr. Fullmoon’s daughter. Luna says her father has been taken away by demons, and begs Noby and Doraemon to help her fight the Demonlord. Can they save Dr. Fullmoon, and stop Devildoom from destroying the world? Full of magic and mystery, the fifth tale of the Doraemon’s Long Tales series!