The Demon Kings Proclamation

On that day, all of Earths people came to know that there was something mysterious happening with their world.

What they saw was another planet. [1]

It was another world.

The satellites that should have been orbiting their planet all disappeared, along with other space stations, causing each country to fall into chaos. However, each one observed this new world and recognized the traces of intelligent life, contacting one another.

The cause was unknown. Its very existence was unscientific and was a contradiction to all known laws of physics.

Another certain country judged those lands to be undeveloped and tried to send in an aircraft carrying people to occupy the land, but it failed.

The planet had allowed drones, but manned aircraft were refused. Those aircraft were blocked by the atmosphere, but managed to return home safely.

What was it? Everyone the world over discussed it.

Another world.

Even through the use of commonly bought personal telescopes, the traces of intelligent life could be found on the planet. Rather, the intelligent lifeforms themselves could be seen.

Excitement swept across the world.

Three days later, it appeared.

What looked like a massive screen appeared in the skies in two thousand locations throughout the world.

Greetings, those of Earth.

I am the one who rules this worlds greatest domain. I am Ars, the Demon King.

Those of Earth, you still do not understand what is happening, do you? Before we continue, allow me to explain.

First of all, your world the world you call Earth, exists in a universe that has a limit. Although explaining exactly what that limit is would be somewhat difficult, suffice it to say that that limit concerns the capacity of how many worlds may exist within it. Weve arrived at one of those limits, so our two worlds have been connected.

If we left things to continue on as is, our two worlds will collide into each other and disappear. There are several paths in order to deal with that, but we have already chosen the path that will be taken.

We will destroy the Earth.

It took a few minutes for what he said to sink in.

It was natural. Someone suddenly appeared saying that they would destroy the world.

By the way, we are prepared to accept immigrants from Earth. However, there is a limit. Six hundred million people. That would be the ideal amount.

We are willing to accept engineers and scientists along with their close relatives as priorities. However, we have no use for humans will unproductive abilities.

Moreover, we refuse to accept the sick and elderly unless they hold unique skills.

You have five days, please use them wisely. At noon of the fifth day, we will send several messengers to the Japanese parliament building.

Although it will not be possible to invade our world until then you are free to try. It has been set such that any objects with a living signature will be temporarily rejected. In the case we are attacked, we will immediately consider it a declaration of war and eliminate the country responsible.

Well then. See you in five days. We look forward to meeting the leaders of your various countries in Japan.

With that, the projections all disappeared.

Aaah~, I was seriously nervous during that speech. I didnt trip up anywhere right?

Their worlds various royal families and strong people were invited into a facility similar to a universitys lecture room. There were many people unable to make the trip due to the distance involved, but they too had been sent information through communications.

The youth that spoke up was Prince Sion of Lemdria. Although he was a genius when it came to strategy, he wasnt able to overcome the demons overwhelming war potential in the previous war.

Its alright. Although they have weapons strong enough to turn our worlds continents into wastelands they do not have a weapon capable of destroying a planet.

Eh?

Oh. Oooh, oooooooh~

Well, you know, Earth doesnt have magic. At least to my knowledge, there isnt even a single mage on Earth.

Sions mouth stayed open. It probably really was something incomprehensible to those of this world as its civilization was developed with magic as its premise.

In other words, they only use magic crystals for maintaining their civilization? You should still need magic to make magic tools though

He then explained the development and growth of science through ancient times, the middle ages, the early modern era, the industrial revolution, and the modern era. He explained the transition of what was used as fuel in as much detail as possible. [3]

This Demon King-sama had lived for more than a thousand years. He didnt remember too many details from that era.

Its possible, but I think it is better to tread that path very, very carefully. Once you make machines through science, humans become unnecessary, leading to problems with masses of unemployed individuals.

Prince Sion grew quiet as he fell into contemplation.

After that, questions came one after another. Ars had Thor and the other reincarnators help out in answering their questions.

I see. The more I hear about their world, the less I understand it.

Even so, its strange that the world that the Heroes are summoned from has no magic

Even Ars was doubtful about that subject. Things like the qigong Ria had practiced in her previous life could only be seen as magic.

For the time being, well assume that Earths army will definitely attempt to attack. What we need to pay the most attention to out of their weapons are what are called missiles.

That nuclear explosion thing you mentioned, is its strength at the level of the forbidden fire magic?

Such power only a huge citys barrier might be able to defend against it.

The assembly hall filled with noise, but as far as the worlds protectors, the God Dragons, were concerned, nuclear weaponry causing the amount of habitable land to diminish would be troubling.

Valis appeared to be concentrated on destroying Earth and Lanna was somewhat worn out from using her power to send the current eras Hero to another world. As for Terrew, she would exercise her power the moment their own atmosphere was invaded.

The extended conference coming to an end, Ria gave Ars, who looked tired despite likely not being too tired, a cold gaze.

No no, you saved me quite a lot there. As expected, those whove made it through to post-secondary schooling are different.

Even so even if we can win, it looks like well have our own deaths.

I dont think there will be too much damage as long as its not declared an all-out war and America starts doing indiscriminate carpet-bombing, at least.

Well, thatll depend on the negotiations with me and Nee-chan.

Yes, during these five days Ars gave them, it was decided that Ria and Serge were to go to Earth.

So, are you prepared?

In truth, Ill be teleporting us there though.

Their destination was Japan. Theyd already decided on what actions to take.

Carla spoke, an uneasy look on her face. Ria kissed her on her cheek.

Although Rias statement made Serge start to get a feeling that something might end up happening, he heard a voice come from nearby him.

Your Highness.

It was Prince Sion, the one who had been speaking actively in the meeting.

By the way, between Sion, a prince, and Ria, an archduke, Ria was distinctly of a lower rank. An archduke wasnt royalty, after all.

Yeah, right now even.

Although his request surprised Ria somewhat, she smiled in the next instant and asked for his reason.

The three whod come from Earth looked at each other before looking over to Ars.

Leaving the explanation to Ars, the two looked back towards Carla.

Ill buy you some souvenirs!

Unlike the short distance teleportation he could use offhandedly, this was a long range teleportation that would bring them all the way to Earth. It took him time to construct the formula.

Constructing the magic even while thinking about something as carefree as how he had to buy something for Chris as well, he finished, the two of them teleporting away.