Your Lie in April
Kōsei is a child prodigy in playing the piano. He was called the "Human Metronome" because of this. a product of his mother's overly strict methods of teaching. The way he played the piano helped him win many competitions in Japan. When his mother died, he could not hear the music he played on the piano. He stopped playing the piano after that. Two years later, he began playing the piano again because Kaori forced him to become her accompanist.