On the night of September 11. Jin was going to the moon.

"Are you sure you didn't forget anything?"

"Yes, I'm fine."

Zion and Marikka were supporting Jin as he was going to the moon.

Zion, in particular, was checking the loading of necessary supplies such as food and water, as if she were a mother caring for a child going on a field trip.

"How long does it take to get to the moon (UNY)?"

"Well, ......."

The distance has not been precisely measured, but it is estimated to be about 370,000 to 380,000 kilometers.

"Pegasus 2's top speed is probably around 100 kilometers per second, so it should take a little over an hour to get there."

"That's amazing. ......"

He can go out for breakfast and come back before lunch.

I haven't tried it, though."

No, your father tried it when he made it.

I see.

Reiko, who knew the time of the production, added her own words of advice, which made me feel more secure.

"Well then, let's go."

After confirming that the cosmic ray protection warding generator and the air conditioning system were working, Jin said with the ease of a short trip to the next town.

"Oh, and the warp gate is working okay, right?"

"Yes, I checked that first."

Since the warp gate via Horai Island or might not work, the emergency escape gate that leads to the clan territory has been newly installed.

This will allow us to return in case of emergency.

"Then I guess we'll be fine."

Zion was very anxious.

"Well, I'm off then."

"Okay, be careful, Jin."

"Take care, Jin-sama."

The Pegasus 2 takes off soundlessly toward the moon shining brightly in the night sky.

The pilot is Reiko. Her co-pilot is Hope.

"Father, I'm going for top speed."

"Yes, I'm on it."

Reiko was the test pilot when Jin of the future built this plane, so she can be trusted to fly it with confidence.

<

The acceleration of 196 meters per second per second would have taken Pegasus 2 to a tremendous speed of 10 kilometers per second in 51 seconds.

"The repulsive field is working properly."

<

"When I go back to ......, I'm going to have to build this?"

Jin thinks it's hard work, but he also thinks it's worthwhile.

"Your father can do it."

Reiko's words were not flattery or obeisance, but she knew him well, and Jin couldn't help but nod his head.

* * * * * *

As planned, the moon approaches in an hour.

"Can you contact <>?"

"Yes, father. Yes, father.

No matter how much information the has about Jin and the others, it is impossible for them to suddenly expand into space. That's why the old man sent the Watcher to the moon.

"<> from Horai Island. Pilot <. Control Magic Brain <, please respond>."

Reiko called out, and was immediately answered.

This is . Welcome to the moon, Reiko.

"<

Copy that. Opening airlock. Please come to the North Pole of the moon.

The North Pole here is perpendicular to the plane of revolution of the Celan solar system and the same direction as the North Pole of Arus. This is because the moon (Uni) does not revolve around Ars.

As Pegasus 2 headed toward the airlock, a large hole opened up below it. It is an airlock.

"We're landing."

Reiko maneuvered Pegasus 2 skillfully and landed in the hole.

The hole was a pit, about 100 meters deep, and as Pegasus 2 descended, the hatches closed over its head.

When all four hatches were closed, Pegasus 2 reached the landing pad.

"Father, it's one atmospheric pressure outside, and there is air to breathe."

"Okay."

Jin put on his space suit and stepped off Pegasus 2, just in case.

Welcome, Jin-sama.

The voice of the management brain greeted Jin.

"It's been a long time."

Yes, sir. Jin-sama, you have not changed at all.

Jin smiled inwardly at these words, for it is only natural that he has remained the same since he arrived here 400 years ago.

I'm here today to remodel the Watcher.

"Alterations? What are the details? Do you need materials or help?

"The modifications are for the magi emulator. I've been counting on you for materials, so I'd like to ask you for help."

I understand.

opens the bulkhead and invites Jin inside.

Jin has a general idea of what is going on inside.

By the way, who is the other attendant?　It doesn't match the information in my memory.

By "the other follower" I mean . She was silently following him so as not to disturb him.

"Oh, I'm sorry. This is <. It's an assistant golem I made recently."

I memorized it. Thank you, Hope, for your help.

"<>, please take care of it for me."

In the meantime, we arrived at the factory in the moon.

Please feel free to use the materials here.

The moon (UNY) secures asteroids and cosmic dust that occasionally visit the moon, and processes and preserves them as materials.

Fragments of , which has returned to Ars before, are also stored here.

"Ah, this should be enough.

Jin immediately set to work on his magic tool.

"Father, the formula you are writing seems to be different from the previous one.

Reiko asked, peering into Jin's hand.

"Oh, it's okay. I've added another security.

"More security, you say?"

"We've added an authentication key (password).

It is incorporated in some magic tools and magic machines, but it was not used much in Horai Island.

This was because <> was used, but now that it was found not to be perfect, Jin decided to actively introduce other methods and combine them.

"It's still the same hassle when it comes to authentication," he says. All you have to do is recognize ......<> and say the > in <>."

"I see, that's true."

"Let's set the authentication key (password) to ......<>."

Jin thinks that the name is in Japanese, and especially the person's name, along with its exact pronunciation, would be unbreakable by an ordinary person in this world of Ars.

"That's certainly a good idea, father."

Reiko agreed.

Jin quickly makes a magic tool.