This is Idol Wars Z spin off.'You're the idol you used to sing to on stage?'After their first live performance, Nobuyuki and Ai have a fateful encounter with the top idol, Nagisa Yukihiro.Six months later.With Miwako's kindness, Nobuyuki and his friends attend a joint lesson with Uesugi Productions, a long-established entertainment production company.While getting involved with Nagisa through joint lessons, it is decided that an idol festival - DivaFes - will be held, but...'What are you going to do? What do you want to do as an idol?''I want to join in–no, I want to try!'DivaFes in a joint lesson, and Ai takes on the trial to take the next step as an idol.