In the year 2045, singing has been forbidden. Music is no longer created or performed by humans; instead, a music application called MiucS produces all songs on their behalf. One day, a girl named Seria Aiba hears a human singing voice while out with her friends—something that should no longer exist. Following the sound, she encounters a mysterious presence: a ghost. What appears before her is not an ordinary spirit, but a figure from beyond this world known as a Great Ghost. As Seria becomes drawn into encounters involving Great Ghosts, the psychic organization TERA, and a strange song known as the Possession Requiem, she finds herself stepping into a hidden side of a world that has erased human music. This is the story of how Seria's life begins to change—and the path that leads her toward becoming a ghost herself. (Source: MAL News)

It has been announced that the "Unit Cup" will be held at Starlight School's middle school. The eight units selected to participate in the Unit Cup are raring with excitement. This time, there will also be a corner unique to the event where idols will report on each other's true selves behind the scenes. The idols clash more passionately than ever!? Right here and now, the curtains rises on the Unit Cup! (Source: All Aikatsu! Wiki)