The Breaker

The Breaker (브레이커) is a Korean manhwa series illustrated by Park Jin-Hwan and written by Jeon Keuk-Jin.

Serialization
It is published in two Parts so far:
 * Part I (titled The Breaker) was published from 2007-2010. The series has been released in the form of 10 Tankoubon volumes, with a total of 72 chapters.
 * Part II (titled The Breaker New Waves) is published since 2010 and is currently ongoing.

The Breaker
The new English teacher, Chun-Woo Han, is not your ordinary teacher. He is a master of Nine Martial Arts and an enemy of a fearsome world called Murim. Shi-Woon Yi, a student at the Nine Dragons High School and victim of constant bullying, accidentally witnesses Chun-Woo's fighting skills, and requests to become his disciple. What Shi-Woon didn't know is that, what he thought to be a way out of his miserable life would also be a way into a living nightmare. As Shi-Woon becomes his disciple and enters in this new world many surprises and dangers await both student and teacher.

The Breaker New Waves
Direct continuation of Part I: After his master (Chun-Woo Han) destroys his Ki-Center, Shi-Woon leaves the world of the Murim for a normal life believing that this is what his master wished for him. However, for the disciple of a most hated and feared villain in the Murim, holder of the Phoenix Medallion of the Sun-Woo Clan and successor of the Black Heaven and Earth Technique, the world of the Murim will come to him. New allies and enemies await Shi-Woon, who once again rises in the dangerous and merciless world of Murim where everything is permitted.