Ren Sarain was a weak adventurer who couldn't level up in the dungeon, however, he had a secret class that was locked, unable to find the way to open his class, he's faced with hopelessness, until one day he managed to open it with sheer determination and hard work. From now on, his life will change!  (IN HIATUS FOR REWRITING PURPOSE) I became a dark knight in a world full of dungeons was going through a heavy overhaul from the ground up and it would take a month to do so, I'm sorry for you all who are waiting for a new chapter but I promise it would be better, next month it would be uploaded as a new fiction with a new title.  (Vampire Job Class: Daily Life Through Misunderstanding)