In the bustling setting of Kyushu High School, introverted prodigy Kaoru Nishimi resigns himself to another year of isolation. However, his world shifts when he crosses paths with the jazz-loving rebel Sentarou Kawabuchi. Encouraged by Sentarou's passion, Kaoru delves into the world of jazz music, stepping out of his comfort zone and forging his first genuine friendship. Through after-school jam sessions at Ritsuko Mukae's family record store, Kaoru uncovers the transformative power of music, sparking a summer filled with newfound connections and self-discovery. 'Sakamichi no Apollon' intricately weaves a tale of camaraderie, melody, and romance as these three souls bond over their shared love for jazz.