"Soap or ......"

Jin comes out of the bath and relaxes in his yukata.

He noticed a piece of soap on the table. It had a nice lather and a nice fragrance.

Jin has made many things, but he has not made soap.

At best, he used Rita's seed as a substitute for soap and spread the word that baking soda can be used to remove oil stains easily.

Jin knows that it can be done with fats and alkalis, but that's as far as he has gotten. There was a child who tried it at the facility, but Jin was preoccupied with other things and did not help him, and thus did not know the details of how to make it.

"I wonder if this wise man (Mags) knew much about chemistry," was Jin's impression.

That was Jin's impression. He also wanted to pick up a few things before leaving here.

"But what about bicycles?"

Then Elsa and her friends came out of the bath.

"Oh, you look nice!"

They were all dressed in yukata. It was a little refreshing to see them dressed in something so unusual.

"Kuhu, we haven't seen you here since the summer festival in Kaina village.

"Interesting clothes, aren't they!"

The sliding doors facing the garden open onto the porch, and a cool breeze comes in. The cool breeze comes in. It is comfortable for my body after taking a bath.

Jin sits on the porch with Saki on his right and Erza on his left. Hannah is sitting on his lap.

Jin smells the soapy aroma and takes a deep breath, which is not a bad thing.

"Onii-chan?"

"Oh, yeah. ...... guys, you all smell good with soap."

"Yes!　It felt so good!

"Mmm. I want some ......."

"Yeah, I'll get some later."

"That's a good idea!"

Everyone agreed on the soap.

After cooling off on the porch for a while, Jin and the others decided to resume their conversation.

"About what you said earlier, I thought that the fact that you were able to make a bicycle means that there is more than just chemistry.

"Yes, I understand your point, Elsa. But I noticed it when I was working on that bicycle.

Elsa looks doubtful when she hears this.

"I noticed that the details were not reproduced as well as they could have been."

"Is that so, Jin?"

Saki, unable to remain silent, spoke up.

"Yes. The way the spokes were installed was a little strange, the way the brake pads were used, the way the brake levers and wires were installed..."

"How do you know all that?"

"I'm a chemist, but I think I could at least maintain a bicycle by myself, that's all."

"Hmm, as expected of you, Jin, you are a Magecraft Meister, aren't you?"

Saki was impressed.

"Didn't you all use soap?　I thought that if you can make something like that, you must have a strong background in chemistry. In addition to that, I think you know a lot about anatomy.

"Why is that?"

Now Elsa asked.

"You know, I repaired an automata called before, didn't I?　I saw how the skeletal structure and muscles were formed at that time, and that's what I thought."

"I agree."

"What do you mean?"

Elsa is convinced and Saki is questioning.

"Saki, human muscles are slightly skewed. That's why we can twist our arms and legs.

It was a very brief explanation, but the perceptive Saki understood it.

"I see. That makes sense."

At that moment Jin noticed that Hannah, who was sitting on his lap, was quiet.

"Oh, Hannah, I think she fell asleep. Let's put her gently back on the futon.

"Yes, that's a good idea."

So Jin and the others went to their rooms and rested.

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

Jin would like to visit the north, but there are many things to see here in Miyako.

So we decided to stay at least 3 or 4 days to see around Miyako and its surroundings.

My guide, of course, was Mii.

She was very knowledgeable for her age and answered most of my questions about the town and its culture.

That building is the oldest in town, but it has been remodeled three times, so all that remains of it is its foundation and base.

"This is the Central Library. It has the largest collection of books in the city. You can browse freely, but you cannot take books out of the library.

This is a national park. It has a botanical garden and about half of the plants found in Japan are planted here.

"This is a museum. It exhibits tools that are no longer in use.

There were so many things to see that the day was over after visiting only four places.

Saki was most interested in the library, while Jin was more interested in the museum. Erza, like Jin, went to the library, and Hannah went to the library.

"Why don't we have a free day tomorrow?

Saki suggested after dinner. She wants to check out some books in the library.

"Onii-chan, I want to read books too!

Even Hannah said something like that. According to her, she has read most of the books in the Nido Castle in Kaina Village.

However, even though she has read them, most of them, such as mathematics (up to the level of simultaneous equations) and books on magic, she has not been able to understand their meanings even though she has read them.

Still, Jin thought it would be good for Hannah to be exposed to books at her age, so he agreed to Saki's proposal.

The books, however, are not so full of information because each book has about 100 pages and many handwritten characters.

"With Aaru's ability, he can probably memorize about 100 books in a day."

When Jin said this in Mii's absence, Saki looked surprised.

"I see. Is it more convenient or more mysterious?

"I have a feeling that if Jin-san says something to the sheik, Hiro-san, he'll let us memorize the contents of the book with impunity."

Erza interrupted. Jin agreed with her. Then we should make a formal offer.

Saki and Hanna spent the next day at the library.

"Saki, take care of Hannah. Hannah, be a good girl."

"Yeah, I'll take good care of her."

"Okay, sweetie!　I love books!

Aal is with him now, so there's nothing to worry about. <

"What about food?　Don't get so carried away that you don't eat.

Jin, who was concerned about Saki in particular, warned her that she might skip meals if she got carried away,

Erza suggested, "Brother Jin, why don't we meet up and have lunch together?

Erza suggested, "Brother Jin, why don't we meet up and have lunch together?

"Jin brother gets so absorbed in his work that he doesn't even care about his lunch.

"......"

Jin had no words to reply.

So on April 10, Hanna and Saki went to the central library together, and Jin and Erza went to the library.

Both libraries are located next to the park and are only about a hundred meters apart.

So we all went to the library first. At the reception desk, Mii talked to a librarian who seemed to be able to help us in various ways.

"Jin, we'll meet back here for lunch.

"See you later, Onii-chan!"

"Yeah, I'll see you for lunch."

The library has a cafeteria and coffee shop adjacent to the library, so they decided to have lunch there.

After separating from Saki and the others, Jin and Erza went to the museum guided by Mii.

Since they had only been able to take a quick look at the exhibits the day before, they planned to take their time today.

Mii is familiar with such exhibits, which is convenient for us.

"First of all, let's go to the first floor, where there is a section for vehicles.

A carriage, a bicycle, a rickshaw, a palanquin, a palanquin, and a palanquin are displayed, and a doll of a horse is displayed as a domestic animal for riding.

"I guess they used horses, too."

But then, horses are rarely seen.

"Yes. They were quite popular in the past, but there was an epidemic of horse sickness about 600 years ago.

Mii explains.

Even today, there are many infectious diseases that affect horses, such as equine paratyphoid, equine influenza, and Japanese encephalitis.

It is said that the number of horses in this area has been drastically reduced due to one of these diseases.

"Then rickshaws began to be used in town, and bicycles between towns.

"Oh?"

The bicycles displayed here were equipped with rubber tires.

I pointed this out to him,

Yes, the bicycles with steel wheels are the old type, and the new ones are made of rubber. But the new model can no longer run because there are no more rubber tires to replace the old ones.

The explanation came back to Jin.

Hearing this, Jin decided that this was his chance to ask something that had been bothering him.

"I have one question.

"Yes, what is it?"

"Where were bicycles and rickshaws made in the first place?"