The story takes place two years after Aikatsu Friends! with Aine Yuuki now in high school. One day she has an encounter with the mysterious idol Hibiki Tenshou who wears the shining Jeweling Dress.

An idol's brilliance illuminates the dreams of humanity. Starlight Academy, a holy ground for celebrities in training, seeks to realize this belief. Behind its rigorous entrance requirements lie not only the top young stars in the entertainment business, but some of the best memories these students will ever have. Or so Aoi Kiriya believes. Alongside her best friend Ichigo, Aoi decides to apply for the prestigious private school in hopes of living up to the praise of the biggest idol in the world: Mizuki Kanzaki. As they journey through the numerous laughs, friendships, and heartbreaks that await them, can the two girls light up the lives of others as Mizuki has done for them? Whether it be chopping down Christmas trees, traversing obstacle courses, or even rock climbing, there's always a playful new adventure to be found in the world of Aikatsu!. [Written by MAL Rewrite]

The spring term is beginning for the students at Lillian Girls' Academy. Friends are reunited, but for the Yamayuri Council, it's a bittersweet time. Yoko, Eriko, and Sei are busy preparing to depart Lillian while Sachiko, Rei, and Shimako are doing their best to ensure that their dear sisters receive a memorable commencement. Sei's departure will leave a sizable hole in the White Roses, and filling it won't be easy. But is there anyone who could appeal to Shimako enough to become the next Rosa Gigantea en bouton? (Source: RightStuf)

When Yumi Fukuzawa entered the Lillian Girls' Academy, a prestigious all-girls Catholic school in Tokyo, she never imagined she would catch the eye of beautiful and demure Sachiko Ogasawara, one of the school's most popular students. Now Sachiko has offered to be Yumi's soeur, her "sister" and guide for all her years at the academy. The whole idea has Yumi completely flustered—after all, they hardly know each other! The entire campus is abuzz with rumors about the two of them, but Yumi is conflicted over accepting Sachiko's offer. While she admires Sachiko, being her soeur would also mean constantly being at the center of the entire school's attention! (Source: RightStuf)