Arima Kousei gained quite a few piano competitions whereas beneath the strict watch of his mom. He was referred to as the human metronome throughout that point. For the reason that loss of life of his mom, Kousei has been unable to listen to the sound of his piano. He then meets Miyazono Kaori via childhood pal Sawabe Tsubaki. Kaori performs the violin and has a free sprit. Since assembly her, Kousei is ready to face the piano once more. In the meantime, Kaori holds a secret.