Next Episode of SI-VIS: The Sound of Heroes is
unknown.
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.
Samael challenges SI-VIS to a battle over Nagi and the multiple Mirages on the earth.
Apollo launches the final attack on the earth using Nagi. Kyoya stands up to save her.
SI-VIS faces Kokytos in the Mirage. With Siren back, the best performance in the history of SI-VIS begins!
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