Destiny Unchain Online is a Manga/Manhwa/Manhua in english language, Shounen 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

Known for his godlike player skills, "Crim the Headhunter" is the nickname of Kou Mitsuki. He started playing the new game "Destiny Unchain Online" made by his father as a device tester, but as he starts playing he notices the game is full of bugs and his character is a vampire girl. An awesome story where you meet friends and everything changes as you conquer the game! The story... begins!