Tsukikage Hoshi slowly opened her eyes and gave him a surprised look. "You didn't know?"
It wasn't exactly a secret. The fact that Fang Cheng, who had such close ties to the matter, didn't know was truly unexpected.
If Fang Cheng's expression hadn't been so normal, Tsukikage Hoshi would have almost thought he was messing with her.
"I said it was a question that just occurred to me. I never cared about it before."
Fang Cheng answered casually. The question had crossed his mind a long time ago. He'd searched online, but the answers were all over the place, and he had no idea which one was true.
Since it wasn't very important, he'd put it out of his mind—until it suddenly occurred to him again just now.
Tsukikage Hoshi was willing to take his explanation at face value. She chuckled. "Because monsters can never be wiped out."
Fang Cheng noticed that she'd used the broad term "monsters," not just "Monsters."
"Can't be wiped out? What do you mean?"
"Exactly what it sounds like."
The fact that monsters could never be wiped out had become the consensus among all human governments around the world.
In the more than two hundred years since monsters first appeared, they had fought plenty of wars against humanity, and the bloodshed had been immense.
Ordinary firearms aside, humanity had used everything from biological and chemical weapons to missiles and nuclear bombs.
They had been very effective, too. When monsters occupied certain areas, humans could evacuate the people and drop a single nuclear bomb, wiping out every monster there.
But it was useless, because monster populations didn't grow according to the laws of nature.
They had appeared in large numbers from the very start, then continued to grow at a steady rate.
If humans killed off