SI-VIS is a co-ed music group, led by Yosuke, shaking up the global music scene with their unmatched vocals and performances. However, they are actually heroes in disguise, battling against mysterious forces threatening the world. They convert audience energy at live performances into combat power. Luckily, the battles appear to be ordinary concerts to the public, keeping their identity a secret.
E1
Minami Kyoya aspires to join SI-VIS, a music group. But he gets caught up in a mysterious force, Mirage.
E2
Yosuke dies in the battle with the Mirage, and Kyoya is devastated. Soji tells him to go back to his hometown.
E3
Kyoya struggles to reach the other members' level. When his debut stage is about to start, the Mirage appears.
E4
Despite everything, Kyoya leads a fulfilling school life. One day, Rui approaches Kyoya with a desperate plea.
E5
SI-VIS's camp starts off awkward, but eventually, they start to open up. Then, Siren gives them a challenge.
E6
SI-VIS plans to counter the Mirage of unprecedented scale with the new album release concert.
E7
Kyoya invites Nagi to the school festival while on a date. Then, we learn about June's little brother.
E8
Kyoya, μ, and Soji compete for points at the festival. Moved by June's voice, Krios questions his actions.
E9
E10
Rui begins to train Nagi, but Kyoya is upset to learn that Nagi is slated to be a new SI-VIS member.
E11
SI-VIS goes to vacation on an island owned by Seina. There, Kyoya discovers texts that reminds him of Yosuke.
E12
The Mirage appears in Kyoya's hometown, and Lukos's attack drives SI-VIS into a corner.
E13
SI-VIS starts to train during Siren's absence. Meanwhile, a mysterious figures watch over from afar.
E14
Soji visits Kyoya in his hometown to bring him back. Meanwhile, Krios is fueled to avenge Lukos.
E15
The Mirage suddenly appears in Tokyo. Without Kyoya and Soji, SI-VIS counterattacks with a guerrilla concert.
E16
Kyoya tries to help Siren, and Nagi trains hard to step up. Then, a shocking secret is revealed in Harmonia.
E17
Nagi and μ are trapped in a mysterious labyrinth. Separated SI-VIS members fight hard for each other.
E18
The most formidable enemy of all, Apollo, and SI-VIS commence the battle that will determine their fate.
E19
E20