Five years prior, a mysterious event dubbed the Global Synchronic Urban Disappearance caused a significant portion of Ikebukuro to vanish overnight. In the aftermath, residents were plunged into chaos, and unexplained electromagnetic anomalies known as "Auroras" began appearing. High school student Seria Morino is inspired to become an idol after witnessing a performance by Izumi Hinazaki in a play using the "Super Material Theater," a stage designed to revitalize Ikebukuro through hologram-enhanced productions. Soon after, she is recruited by a young woman named Kaoru Sakakibara, who reveals herself to be the director of Alice in Theater—the troupe Izumi formerly belonged to. Determined to chase her dreams, Seria decides to follow Kaoru and joins Alice in Theater. Upon arriving at their facility, she is warmly greeted by a group of young, friendly girls who are all deeply passionate about acting. Yet, something feels off.