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

The new English teacher, Chun-Woo, is not your ordinary teacher. Shioon, a victim of constant bullying, unexpectedly witnesses Chun-Woo’s fighting prowess, and begs him to make him his disciple. Chun-Woo claims he can teach Shioon only if he is truly determined, and Shioon must put his life on the line to prove it. It turns out, however, that Chun-Woo and his powers are more than meets the eye. Shioon makes a grand entrance into the Murim (the hidden world of martial arts), and he is about to be taught by the best there is! The Breaker series has 2 parts, of which “The Breaker“ is Part 1 (vol 1-10) and “The Breaker: New Waves“ is Part 2.