wert's manga / #weak to strong(3)

A man awakened his healing ability but this ability is trash. During a mission in an underground dungeon with his team, all the members of his team except him were killed. This was due to the angry “last priest” who was released because of them. in this dungeon he got a sword and upgraded his powers with that sword…. What would that man do alone against all that?

A new HR teacher, Chun-woo is a nothing ordinary with his wily ambitions and neglect of a bullied boy, Shin-woo. However, after unexpectedly witnessing his great power, Shin-woo begs him to learn it. They could start their lesson only after Shin-woo throws his body into deep river to prove his will. However, Shin-woo did not know his master is stronger than he can imagine. He was a killer with mastery of nine martial arts who was hiding himself after a big mission!

I doubt the author has ever seen a baby before, look at chapter 5 pg 22