Hwasanjeonsaeng(2017)

Hwasanjeonsaeng

Ju Seo-Cheon, a man who survives the age of war through sheer luck and becomes the elder of the Hwasan faction, only to live a life full of regrets and doubts. As he lies on his death bed, waiting for the inevitable, he is returned to the past...

(Source: KakaoPage, translated)

Note: Includes three extra chapters.