SI-VIS: The Sound of Heroes

SI-VIS is a co-ed music band, led by Yosuke, shaking the world with their voice and excellent performance on stage. However, their reality is unknown to anyone; they are actually heroes in disguise. A mysterious force that threatens the world, they fight against it by using the energy at live performances. They convert the energy into a combat power and fight battles, but that seems like an ordinary concert.