Return of the Legend is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Due to the situation like the second IMF, the security company Jang Taesan worked for goes bankrupt, and he becomes an unemployed man wandering around Noryangjin-dong. He loses his life saving an elementary school student who was almost hit by a car. But thanks to his good deed, he goes 14 years back in time and is welcomed to a new life.

However the joy of being revived is short-lived. The thought of having to take the college entrance exam again makes me dizzy... But I remember all of the CSAT problems that I encountered while studying and the stock market graph I saw while working as a stockbroker...?! The last life was ruined, but the this next life will become a success!