Mizuki decides to hold an audition at Starlight Academy for two partners to form a new idol unit, Tristar, with her.

As Tristar continue their success, Orihime announces that Ichigo and Aoi will form a new idol unit, which they personally decide to name Soleil.

As the idols have some new promotional photos taken, Ichigo, Aoi, and Ran, along with Seira, are asked to help promote a new camera model by letting fans take pictures of them. After running into each other while practising their candid expressions, Ichigo, Aoi, Ran, Seira, and Kii go shopping together to explore the range of expressions they can make, before stopping by Seira's café.

As the subject of mascot phone charms is brought up, Ichigo notices Ran seems to have her own mascot charm. Meanwhile, Ran is given a Constellation Premium Dress by Spicy Ageha's top designer and is tasked with performing a Constellation Appeal at her next fashion show.

Dream Academy decides to hold a Christmas party with Kii as producer and Sora at the designer, while Ichigo features on a Christmas cake designed by Asuka.

Aoi is requested to appear in a concert promoting a Futuring Girl Constellation Dress, in which she is expected to perform a Constellation Appeal. As Aoi wonders how she can pull off a Constellation Appeal, Tiara tells her that she is much like water, though doesn't get an opportunity to explain why, leaving Aoi with more questions than answers. Noticing her unease, the other idols each do their part to give Aoi some encouragement.

With graduation approaching for the third year students, Ichigo, Aoi, and Ran are put in charge of the graduation album committee, collecting a large amount of pictures and reminiscing about the memories they possess, particularly from the year Ichigo was away.

Akari shows up with a shorter haircut, which the others help to straighten up. Later, Ichigo ends up encountering Mizuki, who reveals she is forming her own unit from a new agency she founded herself, before leaving some cryptic words concerning waffles. The next day, both Starlight and Dream Academy announce the revival of the Partner's Cup, a tournament for idol pairs.

As Mizuki and WM reach the top of Aikatsu Ranking charts, Mikuru is tasked by Mizuki to reach the top ten rankings of the individual charts, suggesting that she needs to obtain a Premium dress from Vivid Kiss' top designer, Kayoko, who is currently in America. Whilst pondering about how to accomplish this, Mikuru is tasked with growing and delivering a golden Miracle Flower, which requires watering at specific times of the day whilst also working around her busy schedule.

Mizuki and Mikuru announce they want to challenge Soleil in a contest. Deciding to bring Soleil out of hiatus, Ichigo, Aoi, and Ran accept the challenge, but find their conflicting schedules give them little time to practice with each other. Noticing Akari and her roommate being Otome's managers for the day and remembering the time she herself became Mizuki's manager, Ichigo decides to arrange everyone's schedules so that whenever one person is working, the other two act as their managers.

On the night before the last concert in their tour, the girls decide to hold a pajama party, taking pictures to use in their final concert.

As Akari continues to struggle on her own, Ichigo tries to think of a way to help her out. Thinking about her experiences in America, Ichigo decides to open the letter Aoi gave her back then, reminding her that no matter the time or place, she can always talk to her.

With the first years due to perform a yearly recital, Akari tries to keep thoughts of admiration for Ichigo out of her head so she can focus on her performance. As such, when Akari comes across Ichigo on the day of the performance, she attempts to run away from her but is eventually caught.

With Halloween approaching, Johnny tasks students with collecting as much candy as possible in order to star in the annual Nightmare Party.

Raichi and Noelle's classmate, Asahi Azuma, who is a big fan of Akari, learns that she'll be appearing in her first handshake event alongside Sumire.

After Hinaki receives her Premium Dress from Kayoko, the girls focus on the preparations for the Christmas Party. Both Akari and Juri reminisce about three years ago, when Ichigo and her friends cut down a large Christmas tree to cheer up their fellow student, with Akari taking up the challenge of cutting down another tree in the same way.

With literally truckloads of chocolate arriving from fans for Valentine's Day, Orihime announces a "Thanks, Valentine" event to show not one piece goes unappreciated, with cafeteria chef Shun Yotsuba put in charge as head patissier.

When Rin gets an offer to appear in a dance event, she decides to get a Premium Dress from her favorite brand, Dance Fusion, whose top designer, Sonny, used to be in a dance unit with Johnny.

Deciding she wants to be in a unit herself, Madoka asks Akari to become her partner, to which she immediately accepts. Jumping straight into meetings to decide the nature of their club, Akari takes Madoka with her as she goes about her daily work schedule, seeing how she interacts with her fans and learning about why she chose her as her partner. Inspired by Madoka's spontaneous skipping, Akari decides to name their unit "Skips".

After Akari and Sumire are requested for a wedding-themed event, they overhear Johnny discussing an upcoming wedding over the phone, jumping to the conclusion that he's getting married.

As PowaPowa Puririn prepare for the Great Starlight School Festival, Shion learns that the recording schedule for the movie she is starring conflicts with their concert, but becomes determined to attend both.

Wanting to challenge themselves, Akari, Sumire, and Hinaki decide to take Luminas on a nationwide tour. After they manage to get Orihime's approval, the girls receive help from their friends to decide on the theme of their tour; encounters.

The now hottest Jewelry brand "Thrilling Carat" is holding a CM (commercial) audition, and Akari Ōzora, Sumire Hikami and Hinaki Shinjō have been invited to participate in the audition. The three did a lot of research about Jewelry despite their busy schedule in order to pass the audition, and enjoyed it very much. Inspired by the trio, Nono Daichi and Lisa Shirakaba decides to join in on researching...!

The next location of the "Luminas☆Japan Tour" will be held in Osaka! At the location, the unit Akari Ōzora is in, Luminas will be coming across Nina Dōjima, who attends Naniwa World's No. 1 Academy, the Comedy School Osaka is so proud of. Nina whose head features bear ears that acts as her trademark is a cute and intense character...!

A new year has begun, and Headmistress Orihime has announced the beginning of the next Starlight Queen Cup. Everyone has began to make their entries, but Sumire has yet to make a decision on "what kind of queen would she like to be". While Akari and Hinaki are beginning to feel impatient as they already have a clear thought, what will be the answer that deprives from Sumire...?

Akari and the others go to Dream Academy to attend its annual DreaCarnival, where they catch up with Seira and the other Dream Academy idols. Along the way, they discover that Noelle has enrolled as a middle-school student, hoping to become an idol like her sister.