In the vast world of the social media platform 'U,' where users can craft their ideal personas, a rising star named Belle captivates the audience with her enchanting voice. As whispers circulate about the true identity of this captivating singer, Suzu Naito, a timid girl haunted by a traumatic past that silenced her singing, discovers solace in 'U.' Adopting the persona of Belle, Suzu's musical talents resurface, propelling her into the spotlight amidst both adoration and animosity. Amidst the virtual realm's intrigue, rumors swirl about a fearsome entity dubbed 'The Dragon,' whose unexpected encounter with Belle reveals a different side. Now navigating the complexities of fame, self-discovery, and unexpected connections, Suzu embarks on a journey of unraveling mysteries both within 'U' and her own heart.