Jaebeoljip Mangnaeadeul

Having started from the bottom and worked his way to the top, Hyeonwoo finds himself betrayed by the royal family of Soonyang Group, the largest corporation in South Korea, after providing 13 years of dedicated service. Just when he thinks all his efforts have been made in vain and prepares to embrace his death, he suddenly wakes up in the body of Dojun Jin, the youngest grandson to the founder and CEO of Soonyang, having traveled back in time. Having been granted this second chance, Hyeonwoo begins to lay the foundation for his revenge against his evil relatives.

(Source: WEBTOONS)