Welcome to my section on The Breaker. Here I will cover the Manga.

A new HR teacher, Chun-woo is not your ordinary teacher with his wily ambitions. After unexpectedly witnessing his great power, Shin-woo begs him to teach him so he can become stronger. Chun-woo claims he can only teach Shin-woo after he throws his body into a deep river to prove his will. However, Shin-woo didn't know his master was much stronger than he could possibly imagine. He was a killer with mastery of nine martial arts who was hiding himself after a big mission!