Gamer siblings Sora and Shiro have at least defeated the Old Deus Holou, and now theyre switching gears: their next endeavor is to make Holou the number-one idol pop star in all of Disboard! But amid the chaos of their pet project comes a strange message from the representative of the 10th-ranked race, the Ex Machina. . . Is another arduous battle on the horizon for Sora and Shiro?!