Uta, who works and lives in a hotel on Uranus, has always thought that she is different from other people. Whenever she has free time, she sits in front of her computer making things she likes and enjoys herself alone, or goes to cafes alone. One day, she receives a "Future Ticket" - the key to a new life. Despite this, Uta continues to live her life as she always has. However, as the "Star Festival", a festival to commemorate the closest point between Uranus and Neptune, approaches, she meets Paula, a popular influencer from Neptune whom she admires. After becoming close to her, Uta makes a major decision about her life.

Shinichi Chiaki is quickly making a name for himself as the principal conductor of the revitalized Roux-Marlet Orchestra, and Megumi "Nodame" Noda has made leaps and bounds as a pianist at the Conservatoire de Paris. However, tensions mount between the two as Nodame feels left behind by Chiaki's growing success and his close friendship with legendary piano prodigy Rui Son. Disregarding her teacher Professor Charles Auclair's advice, Nodame enters another piano competition in an attempt to jumpstart her own performance career. Meanwhile, those around Chiaki and Nodame are at their own crossroads. Rui begins to doubt herself after hearing Nodame's playing and being denied tutelage from Auclair; Maestro Franz von Stresemann faces the reality of his mortality; pianists Yunlong Li and Tatiana Vishneva feverishly prepare for a competition, while the latter also struggles with her growing feelings for oboist and fellow student Yasunori Kuroki. As Chiaki, Nodame, and their friends continue on their respective journeys, they must not only strive to stay true to themselves, but also remember where it all started. [Written by MAL Rewrite]

After a momentous New Year's vacation and with Valentine's Day approaching, Sawako Kuronuma is beginning to get along with her classmates. However, now that Sawako has realized her romantic feelings for the popular Shouta Kazehaya, she grows hesitant toward giving him obligatory chocolates and decides to not give him any. In turn, Kazehaya, who likes Sawako, feels a distance between them. As February ends and April arrives, the second year of high school begins for Sawako. Luckily, she ends up in the same class as her friends Ayane Yano and Chizuru Yoshida, along with Kazehaya and his friend Ryuu Sanada, in addition to the newcomer named Kento Miura. When Kento develops an interest in Sawako, Sawako and Kazehaya's feelings for each other are put to the test.

A fresh high school year always means much to come, and one of those things is joining a club. Being in a dilemma about which club to join, Yui Hirasawa stumbles upon and applies for the Light Music Club, which she misinterprets to be about playing simple instruments, such as castanets. Unable to play an instrument, she decides to visit to apologize and quit. Meanwhile, the Light Music Club faces disbandment due to a lack of members. This causes the club members to offer anything, from food to slacking off during club time, in order to convince Yui to join. Despite their efforts, Yui insists on leaving due to her lack of musical experience. As a last resort, they play a piece for Yui, which sparks her fiery passion and finally convinces her to join the club. From then onward, it's just plain messing around with bits and pieces of practice. The members of the Light Music Club are ready to make their time together a delightful one! [Written by MAL Rewrite]