Hasujeonseol

The greatest martial artist under heaven? No. A legendary hero of a prestigious orthodox sect? No. Yeo Ja-Seo, a timid, run-of-the-mill underling in the martial arts world. Through a series of coincidences, misunderstandings, and serendipitous events, he is reborn as a mysterious martial arts master. The survival story of Yeo Ja-Seo, a master with the heart of an underling.(Source: Naver, translated)