Destiny Unchain Online is a Manga/Manhwa/Manhua in (English/Raw) language, Shounen series, english chapters have been translated and you can read them here. You are reading chapters on www.mcreader.net 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!