D'Artagnyan goes about her everyday life until she makes a trip to Tokyo. There, she spots Lucy singing alone in the moonlight. Unable to forget the incredible sight, D'Artagnyan's friend Izumo invites her to see a concert featuring the popular Angelic Divas. Little did she know, that experience would completely change D'Artagnyan's life!

To start her new life as a pop idol, D'Artagnyan moves to a dormitory in the city. There, she meets Mustang, Nonno, Alice, and all the rest of the older idols, who tell D'Artagnyan about her legendary roommate. But what kind of person will she be?

To survive as a pop idol, you have to team up. At least, that's what Nonno told D'Artagnyan. Now D'Artagnyan wants to join up with Shion, but something strange happens when she sees a day on the job with Nobunaga, The Demon King of the 6th Heaven!

D'Artagnyan decides she's not going to be beaten by Shion and starts to train. Shion sees this and starts to train alongside her. Soon after, they catch word about a music festival called MSonic! and decide to team up and try out. They're right in the middle of their audition, when suddenly...

MSonic is right around the corner. Unable to perfect Sonic Fever in practice, D'Artagnyan's nerves show. Shion encourages her. At the same time, the Wicked Pistols take the stage. Will Two for All be able to succeed?