Your friends dragged you to their favourite idols' latest concert at the biggest stadium in Yokohama.

After waiting a couple of minutes, the star of the show, Sigma, came on stage, holding an electric guitar strapped around his shoulder and a microphone set piece that was hanging from his ear to his mouth.

You didn't even know who this person was, yet you reluctantly stayed and watched as the massive crowd as well as your friends started chanting his name over and over again.