Fusing With The Ultra Hidden Boss

Ezra was regarded as a relatively talented individual in his class, and people recognised him as someone with good prospects as a future hunter. He was soon to turn 17, and that meant he would be transported to his very first tutorial dungeon.
The tutorial dungeon was unique for every person, but they were notorious for having secrets which allowed lucky or smart people to get ahead as a hunter.
However, the advantage that Ezra got was better than he could have ever imagined.