Singaebangmun

The protagonist, wandering the martial arts world carrying the secret of the red dot, enters Gaebong through a chance encounter with a legendary figure. His master, who had taught him absolute martial arts, dies mysteriously. With the death of his mentor, a pillar of the Gaebong faction, the Gaebong faction gradually declines. The protagonist decides to leave Gaebong to investigate his master's death and create a new Gaebong that will not be ignored.

(Source: Naver, translated)