Kousei Arima had earned the title of the "Human Metronome" with his unparalleled piano skills, courtesy of his strict upbringing and intensive training. His numerous triumphs had made him a darling of both music lovers and his colleagues. However, his mother's sudden death left Kousei reeling with trauma, rendering him unable to hear the sweet melodies of a piano, and causing him to withdraw from performing. Today, Kousei lives a modest life, attending junior high school and cherishing the moments he spends with his buddies Tsubaki Sawabe and Ryouta Watari. Despite his struggles, music still holds a special place in his heart. But fate intervenes, and Kousei is drawn into a fascinating new world by the charming and quirky violinist, Kaori Miyazono. Kaori's infectious energy and unwavering faith in Kousei's abilities persuade him to join her onstage, despite his lack of practice. As their relationship evolves, Kaori adds a new dimension of joy and color to Kousei's life.