Although it is a cave, the flatness of the surrounding rock walls looks like it was excavated by hand rather than by nature. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

However, artificial or not artificial is not artificial, but this hole is inevitably too big and deep, right?

"Are we going to fall to the center of the earth?"

Levi adjusted his position in the air, pulled the girl who was under him into his arms, and then turned around with his back down. I don't know how many seconds have passed since the two of them fell down from the cave, and Levi must have fallen out of the sea level early anyway, if it was really a cave, the two of them were already underground.

"This should be the location of the other space you just mentioned, Teacher. We have not changed any parameters such as ambient temperature and humidity since we fell, which is unreasonable in a normal earth environment. ”

Ryoko Asakura carefully analyzed the current situation of the two, but her expression was not as serious as it should be, but her eyes were serious, and there was a little smile on the corner of her mouth.

Lévi didn't pay attention to the girl's expression, he was still craned his neck and kept looking around, trying to see if he could find anything special, such as triggering individual traps or something.

"I don't know much about the complicated science, but it doesn't feel like a normal place. ”

It is colder on the top of a high mountain than at the bottom, and closer to the center of the earth is definitely hotter than the surface. Levi doesn't quite remember the detailed data of how many degrees the altitude decreases for every 100 meters of elevation, but the basic principle is that he is a person with normal common sense in modern society, how can he not notice that the place where the two of them are at the moment is not normal? If it is true that this vertical cave leads to the center of the earth, he can still be as calm as he is now, then there is a ghost. Even if his overall strength in all aspects is okay, Levi does not have the confidence to take a bath in the magma in the center of the earth and whistle as if nothing happened.

"What the hell is this place down here?"

Levi and Ryoko looked at each other, and it was rare to see confusion and confusion in the eyes of these alien girls from the information integration mind.

"Do you want to slow down first?"

As he spoke, Levi's dark golden sword in his hand had already reached forward and plunged into the rock wall. He didn't stick his sword too deep, and the blade followed the direction in which the two fell. What is needed now is not to stop, but to reduce the speed a little, so that it doesn't hurt if you really hit it at such a fast speed without dying.

“…… It's not really the Earth here. ”

Ryoko said after a deep groan. The two of them fell slower because of Levi's sword, and the wind in their ears was much quieter.

"I don't think so, how long have we been falling, if this is indeed the bottom of the earth, even if we miss the center of the earth, we should almost fall out of the other hemisphere, right?"

"Not really. ”

Fortunately, Levi is holding the A++ level beautiful girl who is famous for her kindness and ease of getting along among the first-year freshmen, and if someone else changes, he may have to mock the ignorance of this liberal arts teacher first. Although it is true that teaching liberal arts does not require much knowledge of science to be proficient, but teachers are not as good as students except for the one subject they teach.

Looking at Levy, it seems like it really won't.

"Careful calculations are complicated, and it's practically impossible to fall directly from one side of the planet to the other. However, even if the diameter of the earth is simply calculated as the height of the fall, it will not take enough time to fall from an altitude of nearly 13,000 kilometers to the ground - if we ignore the various factors of reality and only compare them with the general situation. By the way, if the common 10,000-meter skydive, if the parachute bag and the spare one are not successfully opened, then the time it takes for the person to fall to the ground is about forty-six seconds. ”

It takes 46 seconds for 10,000 meters to fall to the ground, and 460 seconds for 100,000 meters, so wouldn't it take 59,800 seconds for 13,000 kilometers, or 13 million meters?

Although Levi knew that the specific calculation must not be so simple to multiply upwards, not to mention that even such a simple calculation may have been miscalculated. But even if it's wrong, that number is too terrible, no wonder I and Ryoko seem to be falling and falling without end. If this is really falling to the center of the earth, the radius of the earth will also fall by eight hours? Is that what Lévy calculated just now right? His head is really messed up and not suitable for these science questions.

"However, I have just analyzed the information composition of this space, and structurally, this space is not exactly the same as the earth. ”

Yes, yes, the point is not how long it will take for 10,000 meters to fall to the ground and pop tomato juice all over the ground, but what kind of place it is. Ryoko understood what Levi said, probably she meant the ...... in this space For example, the surrounding earth, rocks, constituent elements, or something that are different from everything on earth?

"Sure enough, it's a different dimension, and this situation is basically the same as the situation between me and Alice at that time. ”

The barrier that Levi and Alice were trapped in at the time, according to Alice, was a small part of the Enchanted Forest where she used to live in Gensokyo, and merged with the other world. Now here, it seems to be a similar situation?

"Teacher, it seems to be almost to the ground. ”

Ryoko was held in Lévy's arms, with Levi in the middle of her face up and back down, but she also saw the situation below as if her eyes could turn and turn.

"I feel it too, hold on a little bit. ”

With a twist of Levi's wrist, the long sword stuck in the rock wall turned ninety degrees, and the two of them suddenly slammed and stopped in mid-air.

"It doesn't look like anything special down there. ”

About a few dozen meters below the feet of the two of them was an ordinary-looking ground of dirt mixed with stones. The terrain made it feel as if the two of them were actually inside the mountain.

"Could there be any other mechanism?"

"Possibly, but we can't climb up from here, can we?"

Actually, it's not impossible. Levy's spatial abilities aren't omnipotent, but they're still pretty quick to get around. The two of them didn't know how high they had fallen just now, but if they used teleportation to rush back with all their might, it wouldn't take much time.

But......

"There's no direct access to it. ”

"I think so, when the two of us fell, it was similar to when we entered the mountain from the outside, and I guess we passed through one barrier to another ...... 'scene'?"

Levi remembered the words Kaguya used to play games, and it was a fitting one.