Eumakcheonjaereul Wihan Da Capo

Seon-Yul, the pianist who won the Van Cliburn Competition at the youngest age ever. That night, while returning home after a successful concert, he lost his family and both hands in a car accident. After spending more than a decade as a recluse, Seon-Yul awakens in the body of a 17-year-old boy following a certain incident. The protagonist finds himself possessed by the body of Jeong Seon-Yul, a troubled teenager who is looked down upon by everyone. He begins his second musical journey at his alma mater.

(Source: Naver, translated)