Jack Jeanne: Puppet

Kisa Tachibana is a girl who is fascinated by the world of theater. Kisa's older brother, Keiki, is her idol. Everyone who aspires to a career in the theater dreams of knocking on the door of the Univeil Opera School, where Keiki is a star performer who has been called Univeil's greatest treasure. If only Kisa could one day stand on the same stage as him...... but one day, Keiki disappeared without a trace. To make her dream come true, Kisa enrolls herself in the Univeil Opera School. However, Univeil is supposed to be a boys school...... So she hides the fact that she is a girl, and plays the role of a boy....... This is a tough role for a rookie performance! (Source: J-Books, translated)

The manga follows Kiito Minorikawa, a first-year student at the Univeil Drama School who, despite his young age, has been appointed as assistant to the class leader in the Rhodonite class. While the opera-themed school appears glamorous and lively on the surface, it harbors certain issues that Minorikawa must navigate. (source: tokyoweekender)