In an abandoned Tokyo overrun by bubbles and gravitational abnormalities, one gifted young man has a fateful meeting with a mysterious girl.
In the near future, Vivy, a diva-type A.I., went up on stage each day with hopes of putting her heart into her song. One day, the A.I. Matsumoto, who claims to have arrived from 100 years in the future, appears before Vivy with an important request...
