The prehistory of this plot is that, having gone to Las Vegas with his beloved Girlfriend, the protagonist of the game Boyfriend entered into a fight with Black Jack who is a desperate gambler. However, now they have decided to continue their confrontation in the music arena. So that everyone has the opportunity to prove who is really cool. At the same time, Black Jack has an excellent sense of hearing and voice. This means that he will be a worthy rival to the main character.