Arisu Himenogi, a top student in her class and the vice president of the student council, had a small but persistent problem. She couldn’t handle her own overly sexual body. One day, while doing something lewd and outrageous in an empty classroom, something strange happened to her. She found herself face-to-face with… herself. A version of her from a parallel world—her, but not her. Now, Arisu’s consciousness is swapped between two worlds: the mundane, boring one she’s always known, and a lewd, outrageous one where her other self thrives. What kind of school life awaits her now…?