Mai Kazuki is from a family of magicians. Her grandparents are leaders of a troupe, Magic Carat, and their daughter — Mai's mother — debuted under them. Naturally, Mai wants to become a magician herself, just like her hero, the fabulous legend Emily Howell. Unfortunately, because she is still a young girl, she is very clumsy and unsure. One day, while helping her grandfather move things, Mai sees a strange light enter an odd, heart-shaped mirror and turn into a mirror fairy named Topo. He takes over the body of her favorite stuffed toy, a flying squirrel doll, and explains that he must give magic to the one who can see him. He gives her a bracelet with the symbols of the 4 card suits (spade, club, diamond and heart) which produces a magic wand. By waving the wand, Mai becomes Magical Emi, a teenage magician. She stars in her grandparents' shows, and uses magic to help solve problems. But at the end of the day, she wants to become a magician all by herself.