The Road to Glory is a Manga/Manhwa/Manhua in english language, Drama series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Halo, the best musician of the time, suffers a traffic accident on the way to the Grammy ceremony. And when he regains consciousness, he finds himself in the body of a little Korean boy named No Hae-il. He finds himself in a completely different place and time. He confirms that No Hae-il's English name is Halo and feels a strong destiny. Halo, who entered Hae-il, proves to be a musical genius at this time as well.