Nonhyeon-dong Merchant 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

Gwangsu Seong, a 27-year-old young man who ended up running into dept four times after starting the bussiness with his youthful ambition. I thought it was really over, but the last change is here. The owner of a Jjamppong restaurant called the ´god of business´ in Yeongdong Market. I’m trying to earn something from underneath… “I’m not raising such a discipline, so get out of it!” Isn’t this grandmother’s personality unusual?! But I will never give up! Can you learn the secret Jjamppong recipe and succeed this time? Self-employment survival story of struggling business beginers.