Arima Kousei's mother wanted to train Arima to be a world-famous pianist, and Arima lived up to her mother's expectations and won many piano competitions when he was in elementary school. In the autumn when he was 11 years old, Arima's mother passed away. From then on, he could no longer hear the sound of the piano he played. He was frustrated and had to give up playing. However, at the age of 14, through the introduction of his childhood playmate, Arima met the violinist Kaoru Miyazono and was attracted by Kaoru's free and unrestrained. Unexpectedly, Kaoru invited Kousei to be her accompanist during the competition...
