Susanghan Sogongjaneun Cheonhasipdaegosu

The once-great Madorim sect has fallen on hard times after being embroiled in the Great War of the Heavens. The sect's Supreme Leader, Ju-Rin, is now faced with the return of his long-lost grandson, the son of his daughter whom he had abandoned many years ago. Possessing the same otherworldly beauty as his mother, he initially appears to be nothing more than a pampered scholar, unfit for the world of martial arts. However, he is in fact the King of Mount Wumian, the very same man who defeated the mighty Yellow River Dragon King, one of the Ten Great Masters of the Martial World! Having returned to Madorim in order to fulfill his mother's dying wish, Jin Murin, the Mountain King now sets his sights on reviving the sect and restoring it to its former glory.

(Source: Naver, translated)