Kyō Nukui, a high school student rarely seen outside his home, found solace in music, sharing his compositions online under the alias HibikiP. One day, a message arrived from an unknown source proposing a meeting in a park. Kyō, envisioning…

Kyō readily offers his assistance to the girls regarding their concert plans. However, Masayoshi Sawatari, the director of the orphanage that shelters them, requests that Kyō persuade them to reconsider.

Kyō learns that Jun and his companions are classmates of his younger sister, Kurumi. However, they seem to struggle for connection with the other students. He also discovers that his childhood friend, Sakura Toriumi, shares a past as an orp…

Kyō and the girls had met with no success in recruiting attendees for the concert. He resolved to return to school and solicit assistance from his classmates, suggesting the girls do the same among their peers.

The concert proved a triumph, and Kyō and the other members now aim to cultivate a larger audience, building a sustainable income from their performances. At the urging of a friend, Kyō decides they should create a promotional video.

Nozomi encounters her grandfather, who expresses a desire to adopt her and bring her to England. Kyō and the others resolve not to pressure her to make a decision about staying, wanting to avoid any influence on her choice, a resolve that i…

Yuzuha Aigae, an online friend, extends an invitation to Kyō and the girls of Lien de Famille to perform a concert on a secluded resort island. Kyō accepts, oblivious to the underlying motives driving Yuzuha's generosity.

Disturbed by the ease of Kyō’s companionship with the other girls, Yuzuha initiates a series of calculated maneuvers designed to expose them, only to be thwarted by Sakura’s perception. As a storm gathers over the island, Yuzuha vanishes. K…

The truth dawned on Kyō: his online confidante was not Yuzuha, but Kiryu Yume, the latter masquerading as the former. When Kiryu made the decision to sever all ties with Kyō and their circle, they resolved to find a means of lifting her spi…

With permission granted, Kiryu and Yuzuha were able to leave the island and enroll in the local school. As Kyō assisted Yuzuha navigating the city, they shared moments of genuine connection, a closeness that stirred a ripple of jealousy amo…

Kyō’s frustration with the amount of time Kyō spends with the girls of Lien de Famille finally boils over. Determined to make a statement, she resolves to form her own performance group, enlisting the assistance of Yuzuha and Kurumi, and ch…

With their preparations complete, the moment had arrived for Lien de Famille and Kiryu's band to share the stage.