the story takes place in a magical world called "fairy tale kingdom". what supplies energy to this world is the happiness floating in the sky. ccc。 what’s bad is that in recent days, the stars of happiness have disappeared one after another. if this situation continues, the fairy tale kingdom will disappear one day. in order to avoid this, the queen decided to send three magic pets to the world, and they wanted to find three girls qualified to be idol princesses and entrust them to help the fairy tale kingdom collect the stars of happiness. these three are xueshen apple, takashi leila and sasawa's original name tsuki. with the blessing of magic, the three girls were able to temporarily grow up. they brought happiness to people through their singing and dancing. because the transformation lasted very short, they were also called "mysterious beautiful girl idol princesses."