We have a level system in place for mankind.

The study of three-dimensional crest was advanced, and it was expected that a fairly small crest structure could be created. Then, research progressed on modifying the red lightning stone power generating device to output the source rejection force, and the source rejection force output device was completed.

We were working on a new three-dimensional crest lab.

Okay, let's test the sigil structure of the source-rejection output device and [source-rejection wave emission] [source-rejection wave reception] together.

When I raised my voice, everyone at the lab replied, "Oh."

Place a red thunderstone in the source repulsion output device and switch it on. Then, the red thunderstone is transformed into a source of repulsive force, and the platinum conductor flows into the flowing crest structure.

A source rejection wave is emitted from the [Source Rejection Wave] crest structure, and the [Source Rejection Wave Received] crest structure receives it, converts it into a source rejection force, and emits it. Its source of repulsion was transformed into electricity and measured.

"We did it. We did it."

The researcher who was in charge of measuring electricity shouted. We were the first Japanese to successfully send and receive source and reject waves.

How groundbreaking this was, it was a feat comparable to Marconi's success with wireless telegraphy. We were thinking of developing a small communications device like a smartphone based on the results of our experiments.

However, since the emblem structure will be built in, it will not be as thin as a smartphone. Our focus on communications is because Agarta had no smartphones or radios at all, making it difficult to communicate with distant regions.

After the development of the communication device stood in the eye, we continued research by creating the crest structure of various three-dimensional seals obtained from "elementary knowledge (three-dimensional seal)" and "intermediate knowledge (three-dimensional seal)".

When three-dimensional sigil communication machines began to be used in Agarta, more people were studying the three-dimensional sigil in the private sector. The Source Resistance Output Device is also downsized and becomes smaller the more it enters the shoulder bag.

What began to be studied in the private sector is a three-dimensional emblem that exerts a powerful resistance to aluminum when it is used as a source of repulsion. She thinks she can use it to make a piston engine.

I think it's easier to turn the red lightning stone into electricity and turn the motor on the red lightning stone generator, but the researchers say it's not fuel efficient.

When converting Crimson Thunderstone into electricity, there was a lot of loss released by heat and source repulsion. Considering this, it is said that the fuel efficiency is better to convert to the source rejection force with the source rejection force output device and run it with the piston engine.

I think it will be a problem that will be solved if the efficiency of the Crimson Thunderstone generator improves, but it will take time to solve it.

While I was helping with that kind of research, my skill list increased to "Advanced Knowledge (3D Sigil)". To get it, we need to defeat the Guardian again.

At that time, the United States called for the resumption of exchanges. When the government was in Japan, it was barely in touch with the US government, but it was discontinued immediately after the shift occurred.

Communication devices that can communicate with the United States were managed by the temporary government of Nagano. It seems that the communications device has not communicated with the United States in a long time.

I went to see Misaki and asked her what to do.

“We wanted information about America, so we decided to meet.”

Hmmm, are you okay?

“The United States moved to a food area early and seemed to be developing, so we could afford it, so we shouldn't be checking around the world.”

"Where do we meet?"

"It looks like we're going to meet on Oshima in the Izu Islands, where there aren't many strong alien beasts."

The population of Oshima was originally small at about 6,000 people, so it seems that there was no strong alien beast. However, the population was reduced to about a thousand due to alien beasts and poison.

The survival of Oshima eventually moved from the transfer dome in Honshu to Agarta. The current Oshima is deserted.

“How do Americans get across the Pacific?”

He says he's coming with a big cruiser.

"Hmm, I thought you were coming by warship because you're talking about America."

Misaki shrugs her shoulders.

"Faction ships are not fuel efficient." America is not lacking in energy either. "

There are shale gases and oils in the United States, so just digging will solve the energy problem.

However, the presence of the alien beast interferes with the mining operation, and it appears to be lacking in energy.

It seems that we need to reduce the number of alien beasts in order to prepare the Americans for Oshima. There are also Guardians, so I decided to help reduce the number of foreign beasts.

Premier Ikoma, who was originally the head of the temporary government, was ill, and Misaki welcomed the American envoy.

We took a boat from Yeosu to Oshima. Passing through the Sekimono Strait to the Pacific Ocean, we head for Oshima on the coast of Shikoku. It took me a few days to reach Oshima.

Explorers, including me and Kawai, swept through the alien beasts and made Oshima a safe place. However, it is forbidden to be alarmed because there may still be foreign beasts left. In the process, I defeated the Guardian and got the "Advanced Knowledge (3D Sigil)".

Among the knowledge gained was the knowledge of the three-dimensional crest that generates forces that can be called antigravity.

“We did it. Now we might get a new plane.”

Kawai turns to me.

"Can you fly to America with that new plane?"

"What do you think? I think you can fly if you take a lot of fuel with you, because it becomes a red thunderstone." But America is full of alien beasts, too. "

Kawai frowned.

Hawaii is full of alien beasts?

"And of course, Hawaii."

Kawai dropped his shoulder in disappointment.

We waited for the Americans when we were ready for the American mission. Then, a large cruiser can be seen in the distant sea, which gradually grows to reach the port of Oshima.

The Americans came down from the ship with a nervous look on their face. He has a small gun and other weapons in his hand.

"Why do you have a weapon?"

It looks like you're on some kind of alert, but I wonder if you think there might be a foreign beast.