Now that you're helping out μ's with their club activities, you sit down to talk with Honoka, Umi, and Kotori, who were friends before they became school idols.

Kotori is usually so kind, supporting Honoka and Umi. However, she has an issue she just can't compromise about for any reason!

μ's' costume designer is Kotori. Now that you know her quirk, you suddenly run into her on the street. Wait, is that really Kotori?!

Kotori is working at a maid cafe under the pseudonym Minalinsky. Working a job and being an idol has her busy, and she's worried about μ's' costumes.

Seeing that Kotori is worried about her costume design, you take her to a museum. She looks heartened to have someone like you around when she's feeling down.

Kotori seems very glad that you helped her, and that she got to go out with you. The subject of conversation naturally shifts to you.

Kotori cares about spending time with you, just like how she cares about Honoka and Umi. Kotori wants to check something with you before doing μ's' solo live show.

Kotori seems to be more excited about watching everyone else's solo live shows than performing her own. She discusses what kind of performance it should be with you. However…

Kotori loves being on stage with the other members, so she is not sure what to do for her own solo live show. You help her discover what she wants to do.

Kotori's solo live show will also feature a fashion show. She is filled with enthusiasm about bringing everyone joy by showing off her style.

Preparations for Kotori's solo live show proceeded full steam ahead once she decided to put on a fashion show! Kotori wears the outfits she made with all her heart and goes on stage for the main event.

Kotori has triumphed in her combined fashion and solo live show. It appears as though she has sent you a letter to thank you for helping her see it through to the end.

Kotori is very grateful to you for helping her complete her solo performance, but there is actually something else she wants to talk to you about. She reveals something to you that she's been bottling up.

Kotori is in two minds after being asked to design costumes for the fashion show at the fashion school's culture festival. However, she just can't seem to hide her passion for clothing.

Kotori worried that she wouldn't be able to juggle both school idol activities and fashion design, but you came up with the idea of having school idols model for her in the fashion show. She puts her heart into the designs!

Kotori got many other school idols to appear in her fashion show and it was a huge success! She's eager to put her newly gained experience to use in Printemps' next sub-unit live show.

Kotori announces that she wants to create beautiful costumes for the Printemps live show. She has some difficulty implementing her experiences from the fashion show, however.

Kotori gets designer's block while trying to make new costumes. She goes out for a change of pace and runs into You and Ruby at the craft store. She invites them both back to Otonokizaka.

Ruby and You advise Kotori that rather than novel ideas, what really matters when designing school idol costumes is that they feel like school idol costumes. Kotori goes on a date with you to the aquarium to think it over.

Kotori remembers something important—making school idol costumes is all about leaning into your group's songs and everyone's individuality. Upon this realization, she whips up the costumes in a flash!

After regaining her school-idol-costume groove, Kotori helped to pull off a hugely successful Printemps sub-unit live show. Afterward, the three childhood friends—Kotori, Honoka, and Umi—appear to be making fine progress at practice together.

Kotori, Honoka, and Umi have been friends since they were children, much like how Ayumu and you are childhood friends. When Kotori hears your stories, she's reminded of the group of childhood friends in Aqours as well.

Kotori and the others decide to organize a party for their dear childhood friends to express their lasting feelings of gratitude. However, they have yet to decide on what to do for the actual celebration.

Kotori and the others decide to make memory albums of past photos to give as presents to their childhood friends as a way to express their gratitude. As they make their albums, Kotori's feelings come to the surface.

Kotori now knows what feelings she wants to get across at the party—that she is who she is because Honoka and Umi were always there for her, and she can keep doing her best from here on out because they are still here for her!

Kotori and co.'s thank-you party for their childhood friends was a huge success! Kotori says that she can only be herself thanks to her friends, and now she resolves to try something new so as to not be outdone by them.

Kotori tells you that she wants to become an even better version of herself by challenging new things this summer. In the library, the two of you happen across a leaflet that inspires you to make washi paper fans.