Suzu is an introverted and ordinary high school student who lives in a rural community. She has been a pale imitation of her former self for many years. However, when she enters “U,” a large virtual world, she is able to escape into her online persona as Belle, a stunning and well-liked singer all over the world.
One day, the performance she was playing was cut short because of a terrible beast being pursued by vigilantes. Suzu goes on an emotional and epic adventure as the intensity of their pursuit increases. She wants to learn the identity of the strange “beast” and find out who she really is in a world where anyone may be anyone.