Birka

Sirius landed on the lunar surface.

Finding ancient cities that have been buried in the dust of time is no easy task.

After all, although the moon is small, it is still a huge celestial body to Sirius and the others, and its surface area may not be much smaller than that of Paradise.

Finding a city in such a vast area is extremely difficult, let alone one that is underground.

In the original work, Enel was able to find that kind of city entirely by chance.

It was because a group of Space Pirate came here, wanting to excavate that ancient ruin. Enel opened the entrance to the ruin while dealing with the Space Pirate.

At this point in time, those Space Pirate are probably wandering somewhere in the cosmos, how could they possibly be here to guide Sirius and his crew?

Fortunately, Sirius still has Black.

Black created a probe capable of surveying the surrounding geological conditions over a wide area.

However, that alone is not enough, since the moon is far too large.

So Black first used a process of elimination.

If you want to build a city on this planet, you must of course take living conditions into account.

For example, one of the most important factors is that the moon lacks an atmosphere. Although the moon also has air, it is unknown why an atmosphere has not formed.

This means that cities can only be built in areas with less direct sunlight.

After orbiting the moon twice and figuring out the basic conditions of the planet, finding the lost ancient cities will be much easier.

The approximate area was defined, and then the detector was used to explore it.

And so, finally, the city that had vanished into the dust of history revealed its presence on the detector.

"Is it right below us?"

Yamato said excitedly.

"That's right."

Black nodded. "This is what the detector is showing."

"Below us, within the earth, lies a vast space."

"That ancient city of Birka can only be here."

"Excellent!"

Sirius clapped his hands. "Then let's go in quickly."

Now that we've found the location, getting inside the ruins will be much easier.

Sirius transformed, sprouting a giant drill bit that rumbled through the ground, drilling its way down.

They didn't go much deeper before their speed slowed down.

Because we've arrived.

After carefully breaking through the final obstacle, Sirius found himself in a dark, empty space, devoid of any light and completely unable to see anything.

Sirius slowly landed on the ground and then turned on the lights.

At this moment, the city hidden in the darkness finally revealed its true form to Sirius and his companions.

Dilapidated.

This was the first conclusion Sirius reached.

It's really dilapidated; there are ruins everywhere.

It's no wonder; after hundreds of years, even the most prosperous cities can only gradually decay without maintenance.

However, one can still vaguely discern the grandeur of this city.

Even underground, there are numerous skyscrapers that connect the above and below, supporting the entire space like pillars.

Of course, there are mostly smaller buildings, densely packed and stretching into the distance; one wonders how many people once lived here.

In the dark and quiet city, only the rumbling sound of the Sirius echoed as it sailed forward.

Is this where our ancestors once lived?

Urouge sighed.

This is indeed the homeland of his ancestors, and its architectural style is very similar to that of the Sky Island.

Sirius and his group wandered around the ruins, and then they came across a huge factory.

No, it's not just one factory; the entire area is filled with factories.

"This appears to be the city's industrial area," Black said.

"Let's go in and take a look. Maybe we can find some of the technology that the Birkans used to have," Sirius said.

And so the Sirius rumbled into the factory again.

The factory was also dark, but by the light from the Sirius, one could see rows of robots neatly arranged.

"Huh? It's exactly the same as the robot on Tsukimi Island!"

Yamato surprise.

These robots are almost identical in appearance to the robots they saw on the South Blue Moon, meaning they are very similar to Black's robot form.

"It's not surprising that the doctor's technology originally came from Birka."

Black jumped under the ship and went to inspect the robots.

"Everything is intact," he said, "But it can't be activated due to a lack of energy."

Sirius nodded; these robots were probably the ones Enel activated in the original work.

Maria said, "It seems that the Birkans were indeed forced to leave their homeland due to the depletion of resources."

That's quite normal. When a civilization develops to a certain level, its homeland can no longer support its continued development.

I continued strolling around the factory area for a while.

Besides the factory that manufactures robots, there are many other factories.

Military factories that manufacture various weapons and factories that produce various types of household machinery.

Black learned a lot.

Although no information was found, he could directly replicate the finished product given his computing power and technological expertise.

"Looking at it this way, the Birkans's technology back then was actually ridiculously advanced!" Luo said.

"That's right,"

Black nodded and said, "Compared to the Blue Sea today, it's probably an overwhelming gap."

"That's amazing!" Hiyori exclaimed.

"Yes,"

Black nodded in agreement, "But I'll also be able to make the Sirius even more powerful!"

Sirius was somewhat expectant.

They continued their search through the city and soon arrived at a temple.

"Sirius, look!"

Yamato suddenly exclaimed, "Is this a story about this city?"

Sirius leaned closer and saw the murals on the walls.

There are also textual annotations.

It roughly tells the story of this city.

From their origins to their development, they eventually had to board a ship and leave the moon for the Blue Sea due to the depletion of resources.

"So what exactly happened after they arrived in the Blue Sea?"

Yamato asked curiously.

The mural ended there, leaving Yamato with Yamato, itchy feeling, like a cat was scratching at his heart.

"Who knows?" Sirius smiled.

However, one thing can be guessed.

The arrival of the Birkans, who possessed exceptional technology, naturally had a significant impact on the Blue Sea at that time.

After all, the writing on the wall at that time was the same as the writing currently used in the Blue Sea.

Isn't that interesting?

Could this be the reason for the Void Century?

Why was this Ancient Text?

Why did Birka ultimately become just a small island in the White White Sea?

Even the descendants of the Birkans know nothing about their past history?

What is the relationship between the winged Lunarian Tribe and the Birkans on the Red Line? They are named Luna, after all.

Arriving here didn't resolve any doubts; instead, even more questions arose in my mind.

Are all the answers to these questions recorded in Laugh Tale?

I can't wait any longer!