音羽舞樱在私立星礼高中过著普通的高中生活。 某一天，突然就要代替消失踪影的阳明咲以“偶像活动Planet！”中顶尖偶像Hana的身分展开偶像活动！ 不过舞樱就是Hana这件事，一定要向大家保密！ 在令人憧憬的世界“偶像活动Planet！” ，谁都可以成为可爱的偶像！ 成为Hana的舞樱，使用Swing穿上寄宿了Dressia力量的礼服，与劲敌们在舞台上大放异彩！ 与好朋友本谷栞，作为模特活跃中的珠树瑠璃，帅气的前辈梅小路响子一起以顶尖偶像为目标！

In the aftermath of the Shi Clan's rebellion, things have finally settled down, and Maomao has returned to her old life as a pharmacist in the pleasure district. One day, triggered by a breakfast served at the Verdigris House, Maomao senses an anomaly and begins investigating its true nature. Meanwhile, Jinshi, who has revealed his true identity as the Imperial brother and begun to face his heavy responsibilities, is deeply troubled by the final message left by Loulan: a warning of an impending "disaster that will strike the nation." To make matters worse, rumors of a mysterious shrine maiden who deceives the people begin to spread, casting a dark shadow over the country of Li once again. From the depths of the inner court to the city streets, and across foreign borders—the world grows wider, and the stakes even higher for Maomao and Jinshi. (Source: Crunchyroll)