Kozuki Mai is an elementary‑school student who dreams of joining her family’s “Magicarat” stage troupe as a magician. Too young and lacking skill, she struggles to perform. One day she discovers a glowing ball hidden inside a stuffed flying squirrel; when she touches it, the doll springs to life and grants her the ability to transform into the 18‑year‑old magician “Magical Emi.” As Emi, Mai can finally take part in the family’s shows, but she must conceal her true identity from both her relatives and the boy she secretly likes.