Gosu (The Master)1
Gosu (The Master) (고수, "Gosu") is a webtoon series authorised by Ryu Ki-Woon (류기운, Ryugiun) and illustrated by Moon Jung-Hoo (문정후, Munjeonghu), with help from Moon Myeong-Ju (문명주, Munmyeongju) and Han Byeong-Hun (한병훈, Hanbyeonghun), that is published weekly on Naver. It was first serialised early in September 2015 and has been going strong since, gaining a growing fan-base and receiving good ratings on every chapter. It was eventually hosted on LINE Webtoons in mid-July 2017.
A young man set forth to avenge his master, a once powerful martial artist who was betrayed by his own men and barely escaped with his life. Armed with his master's supreme martial art techniques, he is ready to bring terror and wreak havoc among the murim. But before he even gets started, he learns that the ones who had betrayed his master are already dead... Erm, so what happens now?