My Birthday Wish To Be A Dungeon Master Was Granted B-day Dungeon

Hello! Daichi here! Ever since I got hooked up on novels and manga related to dungeon managing, I've been wishing every year on my birthday to be one in a fantasy world. Stupid right? But what if I tell you I really am one? Right now I am managing a small dungeon that is still not well-known but in due time. I will make it the biggest and hardest dungeon ever known to mankind!

A/N: MC is a clueless idiot in the early chapters, so anybody wondering why he did what he did, here is the evidence.

Another A/N: I forgot one chapter, (chapter 20) so I added it back. For those who weren't able to read it, I apologize for this mistake, and it won't happen again.