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.
Agent K leaned back in his seat, fixing me with a piercing gaze. "I've spoken to the other witnesses, but it seems you know the most. Can you start from the beginning?"
I nodded, recounting everything I could. I told him about the figure calling himself Rainman, the boy named Hayate who had succumbed to the effects of a mentally corruptive anomaly, and how the enormous monster we fought was, in fact, Hayate after he'd mutated.
Of course, I couldn't tell him everything. Specifically, I had to withhold any information about the grotesque walnut—the "Creepy Walnut"—thanks to a promise I made to the Treecat. However, outright hiding it from an organization as powerful as the Dungeon Foundation wasn't an option. I had to strike a balance, so I feigned ignorance.
"I'm not entirely sure," I said carefully, "but it seemed to be some kind of mentally corruptive anomaly."