Five years following the Zodiac Signs Fes, Vivy retired as an idol due to losing her singing voice following Diva's passing and has now been relegated to a museum attraction. With Ophelia and Antonio's deaths ruled as a double-suicide and no similar incidents like in the original timeline, along with there being no further missions, Matsumoto decides to investigate Yugo's anonymous backer, leaving Vivy in solitude. Lacking purpose, she takes up songwriting and spends the next twenty years trying to compose an original piece, which no AI has done before...