SI-VIS: The Sound of Heroes

SI-VIS is a co-ed music group spearheaded by Yosuke that's gained international recognition for their exceptional vocal talents and energetic performances. The group's members are actually a team of secret heroes fighting against a threat to global security. They utilize a unique strategy where they convert the energy from their live shows into a combat advantage. This strategy keeps their heroic activities hidden from the public, who view their performances as ordinary concerts.