Virtual World: Close Combat Mage is a Manga/Manhwa/Manhua in english language, Action 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 a mistake on his student’s part, a super Martial Artist received the wrong class in an online game and has become a mage. He, who was used to curbing violence with violence and using strength to subdue strength, could only make the best out of this mistake. Taking on a new lease in life, he became a violent close combat mage. When strength and magic came perfectly together, a new gaming path had been opened by him!