Souma Takeshita practiced day in and day out with Akari Jingumae, Beninosuke Meiji, and Hinata Togo with the goal of performing an original band song at the school festival. 3 years after forming, they managed to complete the song and show it at the school festival, but failed their performance. After losing confidence and motivation, Souma's older brother and former famous band member Seiji agrees to become their manager. In order to beat the quota of 1,000 fans in three years, beginning at the school festival held in Autumn, they will start activities again as "Mics!!"