"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.