The Red Flower Opera Music School, a prestigious institution founded during the Taisho era, trains talented young women to become opera performers. Among the 100th generation of students are Sarasa Watanabe, a 178 cm tall innocent girl who aspires to emulate her idol, Oscar, and Ai Narada, a former national idol who has become disillusioned with fame. Their contrasting personalities set the stage for a complex and challenging music school experience.