Hectopascal is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading chapters on https://mangabtt.com fastest updating comic site. The Summary is
Park Han-joon, a brawler who was once called a legend, was frustrated because he had nothing to lose anymore is given a huge amount of money. An eye for an eye. An eye for a tooth… I’ll make you pay for what I’ve gone through! As his outspoken rage explodes, he’ll get his revenge and make them pay as much as they deserve!