Solo Shinkan no VRMMO Boukenki (GIGATOON Studio) 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

In a popular VRMMORPG, [Fantastic Epoch Online], also known as FEO, being encouraged by his childhood friends, Ryu started his adventure as a Priest, which has healing skills in order to enjoy his solo play. After meeting Ashe inside the game and finished a secret quest, he uses 2 maces to defeat his enemies with his own hands instead of using his skills... Thanks to that, he's being feared by other players because of his unorthodox way of fighting as a Priest. He is then being nicknamed Berserker. An adventure of supposed to be priest (fake/lol) is starting now.