In the private Hero High School, where young talents of dungeon explorers gather, Makoto Akaya enrolls, believing in his own abilities. However, upon discovering the gap between himself and his classmates, he realizes that he is the biggest failure in the school. Nevertheless, in the midst of despair, he encounters a skill tree that only he can use, and Makoto Akaya's life begins to change for the better.
My head feels light and floaty. It's that fuzzy sensation where the boundary between the outside world and your skin becomes unclear, like soaking in a warm bath. Slowly, my senses start to sharpen.
I lift my eyelids. An unfamiliar ceiling. I don't feel like getting out of bed. Maybe I should just snuggle in and go back to sleep. With that thought, I close my eyes.
It seems I must have fallen asleep without realizing it. But since when? Where am I sleeping? I can't pinpoint it. I hug the warm blanket closer, trying to piece things together. Although I'm still sleepy, I can at least trace back my memories.
I got caught up in a bizarre anomaly called the Dungeon Hall, right? And then I wandered into an unknown dungeon. Unlike pseudo-dungeons, there were real dungeon monsters there. Dungeon Shiba Inus. I fought them off, got hungry... then I heard a girl's cry for help, met Kotone Hayashido, and—oh, that's right—Shihahime, covered in blood...