The third season of [Oshi no Ko]. The story enters a new stage. It's been six months since "POP IN 2" was released. Thanks to MEM-Cho's hard work, B-Komachi is about to get their major break. Aqua is a multi-talented entertainer, and Akane's career as a talented actress is going smoothly. Meanwhile, Kana lost the cheerfulness she once had. To track down the truth behind Ai and Goro's deaths, Ruby keeps ri...