The story follows two aspiring divas who hope to become famous through a unique brand of music.

The everyday lives of the Minami sisters continue. Chiaki, the youngest, continues to call people idiots while worshipping her eldest sister. Kana, the middle, still can't figure out that Fujioka's feelings for her are a crush, not a grudge. Haruka, the eldest, still unknowingly avoids Hosaka's advances to invite her to the volleyball team, and after a long day of excitement, the sisters enjoy sitting at the table at their home. (Source: ANN)

Maiharu Hiromi has moved from Nagasaki to Kamakura. She begins her new life in Kamakura and her first day in Minami Kamakura High School by cycling to her school, but she has not ridden a bicycle in many years. On the way to the first day ceremony she almost crashes into Akizuki Tomoe. Obviously Hiromi needs a lot more practice, so Tomoe decides to help Hiromi train to become better at riding a bicycle, and they become good friends. When they discover that the school used to have a bicycle club, the girls, together with Kamikura Fuyune and Higa Natsumi, resurrect the club naming it the Minami Kamakura High School Girls Bicycle Club. (Source: AniDB)

The story takes place during a conflict between the Krakozhia Dukedom and the Grania Republic. In the midst of the fighting, a savior appears to the Krakozhia Dukedom, and it is a high school student named Yano Souhei. Two female soldiers, First Lieutenant Ruto and Second Lieutenant Haruka, appear in tanks to intrude on Souhei's everyday life, followed by the enemy soldier Shachirofu, all of whom use firearms without hesitation at his house. (Source: ANN)