Huli covered her head and hopped around in front of the black "high wall," yelping at the top of her lungs. By the time she finally quieted down, a large area of her forehead had turned red, and a sizable bump had risen there.
The Great Demon Fox gently rubbed the bump while tears welled in her eyes.
Eileen, whom Huli had casually thrown onto the ground, lay there motionless as if dead. After a long while, she suddenly sprang up as though she had reestablished contact with her body, then pointed at Huli and started chattering: "Silly fox, next time you're going to do something reckless, can you leave me out of it?! You nearly snapped my waist in half! Do you have any idea how troublesome it is when the joints in your waist break..."
Huli said nothing and continued rubbing the bump on her head.
Eileen stared blankly for a moment. She looked at Huli's head, then glanced back at the black high wall that ran straight through the laboratory. It was, of course, part of the Shattered Tower—the Boundary Bridge—made from mysterious materials that did not belong to this world. Its hardness was clearly beyond imagination.
It might even have been harder than the battleship armor covering Luna's entire body.
"Just how sturdy is your skull, silly fox?" the little doll exclaimed in amazement. "You hit this thing and only got a bump?"
"My... our branch of the foxes all practice Body Cultivation," Huli said in a muffled voice, as if she had also hit her nose just now. "Back when we had no classes at the academy, the elders of our clan would even take us into the mountains to mine with our claws and skulls..."
Eileen: "...Holy crap."
At that moment, Luna also entered