Tiara arrives at Mamkestell to enroll at Flora Girls' Academy. She finds it easy to get in, as "all those with a bright future are given a chance," and meets Rosetta, her childhood friend.
After finding out that her group is in danger of being expelled, Tiara tries to form a study group. Meanwhile, Rosetta keeps running off on her own after school, so the other girls follow.
Tiara is introduced to three sisters from Yamato who also go to Flora Girls' Academy: Kaede, Nadeshiko, and Tsubaki. Supposedly, they get along pretty well, but there seems to be some tension between Kaede and Nadeshiko.
Lucifer and Angelica challenge Tiara and her group to a board game. Meanwhile, some of the other groups survey the forest after reports of something strange happening there.
The girls go look for Maryberry, who has disappeared. Meanwhile, some of the girls may have figured out the cause of the supernatural phenomena they've been sent to investigate.
Tiara and her group finally start getting some points. Tiara comes to the conclusion that she'd like to perform an Orchestra with her friends, and she finally finds out the truth about Yue.
Tiara and the rest of her group try to get ready for their first Orchestra and Tiara also learns more about her old sister Eliza and the unit she was in named Ray.
LiGHTs finds out that they actually didn't get enough points from their Orchestra and are expelled. Tiara is forced to go home and the rest of the girls try to figure out what to do.
Tiara and the others find out that a horde of Magical Monsters is headed towards Mamuceaster, so they try to head back, but Eliza stops them. Meanwhile, the other groups back at the academy get ready for the Ceaster Festival.
All the girls perform Orchestras to try to thwart the horde of Magical Monsters heading towards Mamuceaster. Later on, we learn the secret that Eliza's been keeping.
