The Dark Guild
Yumiro smirked after hearing Orlan Chirla's owner was just level 37 adventurer. Although this man was a man ahead by 17 levels, still, with help of his Zexel. He was assured he could win against him.
"Level 37, with the stats I have right now, I'm already level 40 brawler." However, his current problem he didn't know how rogue-class actually fight.
In the VR world, the rogue class is specialized for making sneaks attack, or to be exact, it was like an assassin that will eliminate the main threat in certain opponents in an instant. However, the rogue capability would change if they choose sub-class when the adventurers reached level 40.
Yet, picking sub-class depends on your status and the book item. This book was called by the adventurer "Upgrading book." By using this, it could enlarge the probability to complete the upgrading. As sometimes, there's a tendency for adventurers to fail to acquire their subclass.