A gust of wind blows a young woman's hat away, prompting a high school girl to sprint past her and leap into the air to retrieve it. However, this is no ordinary girl. Sensing the hat barely escaping her grasp, the girl morphs her body into a fighter jet, blasting off into the distance with a burst of speed to catch it. This encounter serves as the young woman's unexpected introduction to the Henkei Shoujo: seemingly normal girls with incredible transformation powers who live among humans.