On that day, Guest gives a perfect performance, and the cheers of the fans are endless.

Suddenly, a crack appears in the sky, and unidentified demonic beasts begin to emerge.

Humanity fought back, but the beasts were too powerful. Just then, superpowered individuals called Hunters began to appear.

At that moment, Guest, who was hiding at home, was also granted an ability—becoming humanity's first and last SSS-class Hunter.