August 21.

Jin and Elsa are waving to each other in a hot air balloon.

It is the first day of the .

The altitude is less than 10 meters above the ground, and we can clearly see each person's face as they wave back.

A large golem <> holds a rope connected to a hot air balloon to keep it from floating too high.

There are five hot air balloons floating around them, guarding the one with Jin and Erza in it.

"Oh, that's amazing."

"<>?"

"I heard you're a Korun-kun, right?"

That's why he's the Magecraft Meister.

"You were at this year's commemorative ceremony, weren't you?"

"Ah, you're the one who made that girl-shaped automata!"

Reiko's heroic performance of holding the Golem at her beck and call was still fresh in some people's memories.

The girl-shaped automata, Reiko, has disappeared through invisibility, and flies through the sky to protect Jin and Erza with the help of a force field generator.

However, Esia, the capital of the Kingdom of Selroa, was so peaceful that there was no need for this. For several days now, knights and guards have been on the lookout for any unrest.

However, only two people were captured, and they were only merchants who intended to negotiate something directly with Jin.

Of course, the fifth column (Quinta) in the vicinity congratulated them and remained vigilant.

"Congratulations!

Congratulations and best wishes!

It is customary to have a parade at the wedding ceremonies of leading nobles, so the citizens are used to it.

This was the first parade with a large golem and hot air balloons, however.

"Wow, that's a lot of show!"

"......"

Jin and Erza were fed up with the parade.

* * * * * * * * * * * * * * *

Fortunately, that was all for the first day.

The contents of the tour are very rich, but they seem to have made an effort to keep the time short.

"Hmmm..."

"Day 1 is over."

Jin and Erza are staying in a guest room at the castle.

They are accompanied by Reiko and Edgar, and two of the castle's maids of honor are in the next room, just in case something happens to them.

"Good night."

"Good work." "....... But tomorrow is the big day.

"I guess so."

The next day, the wedding banquet will be held in the grand hall of the royal castle. It's a gathering of the nobility and other important people.

But it seems they've forbidden personal contact.

It seems that King Cesar has taken into account what happened in the Kingdom of Egelea, and it can be said that this is a thoughtful gesture on his part.

"More than that, I was surprised to see the progress of the construction of the <>."

"Oh, me too."

Although it is still limited to the grounds of the castle, the track was being laid for about 100 meters ...... long enough to run on a trial basis.

At first, it is supposed to be a round-trip operation between the main gate of the outer wall of the Royal Castle and the courtyard of the Royal Castle. It seems that guests will be transported to and from the palace by monorail instead of horse-drawn carriages.

<

said King Cesar.

"I'd really appreciate it if you could throw us a reception. To be honest, I'd rather be involved in that ......."

This was Jin's heartfelt voice.

* * * *

Due to the tight security (including Horaijima's forces), the date changed without incident and the day dawned on August 22.

On this day, after a light luncheon, the reception was scheduled for 7 hours from 2:00 to 9:00 p.m. Therefore, the morning was relatively free.

Therefore, the morning is relatively free.

However, since they do not know many people in the Kingdom of Selroa, Jin and the others have some free time on their hands.

Then, they were told that Mr. Latant, Director General of the First Ministry of Technology, was coming to visit them.

Since he had some free time on his hands, Jin decides to ask him to come in.

"Jin-dono, excuse me."

"Hello, Jin-dono, excuse me. How are you?

<>The word "how are you? Because Latant's face was covered with dark circles.

"Ah, ah. I'm a little sleep deprived. I'm ...... actually about that."

Let me ask you about it.

"Actually, ......"

Latant's problem is <.

He is trying to make several cars of the same type, but he can't seem to get it right.

"What part of this don't you understand?"

I thought I left all the blueprints and manuals with you," Jin asked if there was anything missing.

"No, it's the material of the wheels."

"What?"

The monorail that Jin built uses wheels made of metal ...... special steel for maintenance.

The special steel is nickel-chromium steel. It is similar to stainless steel in composition, but is not called stainless steel because of its low ratio of nickel to chromium.

Jin used a sample with 2 percent nickel and 0.2 percent chromium.

"The that Jin-dono wrote in the manual, can we get it in our country?"

"Ah ......"

I've seen nickel ore here and there, so it should be easy to find in the Kingdom of Selroa, but what about chrome?

"Come to think of it, I've never seen chromite ore. ......"

Both nickel and chromium are important rare metals, and Jin had seen ore samples of them when he was in modern Japan, but he has not seen much of them here.

(I guess I was careless because it's on Horai Island. ......)

The previous Magecraft Meister, Adriana Barbora Zetsi, used stainless steel at an early stage and was therefore familiar with nickel and chrome deposits, but at the moment the engineers here do not recognize chrome.

"Well, you can use just nickel, can't you?"

Since there was no problem at all in terms of strength, Jin gave this advice.

It would be a problem if the material or structure was changed by someone's judgment, but it would also be a problem if the engineers were so obsessed with the matter that they could not proceed any further.

Jin thought that he had come to the Kingdom of Celuloa at just the right time.

"Well, the < in this case is to improve the hardenability, so you don't need to put it in if you want to finish it with engineering magic.

In the case of water or oil quenching, simple carbon steel is not hardenable to the of large parts. This is improved by adding chromium.

There are other effects such as increasing wear resistance, but the addition of nickel alone is sufficient for practical use, so Jin explained this point.

"I see, I understand now. Thank you very much."

After two hours of detailed explanation, Mr. Latant, Director General of the First Ministry of Technology, left Jin's office with a radiant face, a far cry from when he had arrived.

"I brought some reference books with me, but they didn't mention such materials. I'll add them next time.

"Yes, that's a good idea."

It is now 11:30 a.m. and almost lunchtime.

Lunch was to be served with King Cesar and some of his entourage.

"I think they're going to pick us up soon," Jin muttered.

Jin muttered, and almost at the same time there was a knock at the door.

"Yes."

Reiko opened the door, and sure enough, there stood Cesar's lady-in-waiting.

The luncheon meeting was about to begin.