1st season premiered on April 9, aired for 24 episodes
Jun Sakata (To Your Eternity) was the anime’s production supervisor and chief producer. Seiji Kishi (Assassination Classroom, Persona 4 The Animation, Classroom of the Elite) directed the anime at Nippon Animation. Yuuko Kakihara (Chihayafuru, Digimon Adventure tri., Persona 4 The Animation, 2022 Urusei Yatsura) both wrote and oversaw the series scripts, and Kazuaki Morita (Assassination Classroom, Classroom of the Elite, Persona 4 The Animation) designed the characters.
Indonesian publisher Elex Media is releasing the manga, and it describes the story:
In the fall of his third and final year of middle school, Hajime Aono, a violin prodigy, stopped playing violin for his own personal reasons. But it was also that year when he got to know a girl who told him about a high school with a prestigious school orchestra. Suddenly, the gears in the clock of Aono’s life began to turn again. This is the story of a youth drama that brings forth the harmony between music and the heart!
Source: Blue Orchestra anime’s website