Suzu is a shy, ordinary high school girl living in a village. For years, she has been the shadow of her own self. When she enters "U," an incredible virtual world, she escapes into her online persona, Belle, a stunning world-renowned singer.

One day, her concert is interrupted by a monstrous creature being hunted by self-appointed avengers. As the hunt intensifies, Suzu embarks on an epic journey to uncover the identity of this mysterious "monster" and discover her true self in a world where you can be anyone.