Kageki Shoujo!! Season Zero

(from ebookjapan): The "Koka Revue" has a tradition of over 100 years. Sarasa Watanabe, who has just entered the music school that trains its talents, will she be able to become the "Lady Oscar" of her dreams? This is the prequel to the popular "Melody" serialization of the life of the splendid Revue Music School! (This is a re-edited e-book of the Shueisha version of "Kageki Shojo!)