It's been a long time since I've been in this town.
Wafu.
"Wafu.

　After I had finished sorting out my magic tools, I had come to the city where I had registered with the adventurer's guild and the commercial guild on Soraya's recommendation, in order to refresh my mind.
　The difference between this time and last time was that I had already visited the city once before, so I could use transfer magic to get there.
　However, I couldn't just suddenly transfer to the city, and there might be something wrong if someone saw me transferring, so I transferred to a location a little far from the city.
　As such, when I headed to the city for the first time in a long time, I was subjected to the same checkpoints as before.
　However, since I now have a guild card from both the Adventurer's Guild and the Commercial Guild, there was no problem with my ID.
　When I entered the city, I spoke to the knights.

We can stop by the Adventurer's Guild, but let's sell the magic gear first. Then we can stop by the Adventurer's Guild and get some more simple requests.
"Whoa!
"Aah!

　After deciding on today's plan, I moved directly to the commercial guild.
　When I entered the guild, I found the receptionist's place vacant, where I had sold the pepper before, so I moved there.

Hello?
"Yes, hello ......, Mr. Yuya?
Yes, yes. It's been a while, hasn't it?
It's been a while. Oh!　I'm sorry. It's been so long that I couldn't help but think of ...... By the way, the pepper that you brought in is very popular!
Is that so?
Yes!　Not only the pepper, but also the container bottle was of very high quality. ......

　That's a bottle and pepper from the earth.
　It's not like I made them, and they may just be mass-produced now, but it's nice to see something from Earth being praised like this. No, I really had nothing to do with it.

If you ever want to sell it again, please let me know.
"Yes, please let me know if you ever want to sell again at .......

　When I thought about it, I realized that I didn't know the name of the receptionist in front of me, and I stammered.
　Then the receptionist noticed it too.

I'm Cattleya, a receptionist at a commercial guild. I'm a receptionist at a commercial guild.
I'm sure you'll agree. I look forward to working with you!

　When I finished my self-introduction, Cattleya-san tilted her head.

So, ......, what can I do for you today?　Are you here to sell me pepper again?
I'm sorry, I don't have any pepper for you today, but I'd like to sell you some magic tools. ......
"Oh, you can make magic tools?
Well, yes. Well, yes. ......
May I see the ......?
Yes.

　Puzzled by the change in Cattleya-san's mood, I took out the wooden box with the refrigerator functions and handed it to her.
　When she opened the box and felt the cold air wafting from inside, Cattleya-san froze.

She froze as she opened the box and felt the cold air inside.
"Oh, um, ......?
...... Excuse me, can I have a moment of your time?
No, it's fine.

　As I saw off Cattleya-san, who had turned bloodthirsty and headed off somewhere, I was inwardly breaking out in a cold sweat.
　I'm not sure if I've done something wrong.
　The librarian in the city's library, Rena, told me that if there was a magic tool made of wood that could be refrigerated, she could sell it, so I brought it to her. ......
　If you think about it, she also said it would be revolutionary, and it's totally f*cked up.
　But I thought if I could make it out of wood, it might spread to the average household, and help a lot of people. ......

"Well, I guess what's done is done.
"Wafu?
WTF?

　I'm sure you'll be able to figure out what's going on. I'm not Akatsuki, but I think it's important to live a bit roughly.
　While I was thinking about this, Cattleya came back with Reinhardt, the guild master of the commercial guild.

Thank you for waiting for me!
It's been a long time, Yuya.
It's been a while, Mr. Reinhardt!
I'm glad to see you're doing well. I'm glad to see you're doing well. So, Cattleya, you were upset about something.

　I'm not aware that I've brought anything that amazing, so I smiled and showed him the refrigerator.

This is it.
"Is this ...... some kind of magic tool?
Yes.
...... In case you're wondering, who made this?
I did. ......
Oh, yeah. ......

　Mr. Reinhardt let out a sigh at my words and started inspecting the refrigerator.
　But when he noticed the cold air wafting from the wooden box, he froze, as did Cattleya.

"Well, I didn't think ...... this was .........
Guild Master. This box is probably a magic tool used to cool and preserve foodstuffs. However, its material is .......
"...... wood, huh?

　I'm not sure what to make of it.

"...... Yuya-kun. If you want, you can ask to see the magic letters engraved on this magic tool?　Of course, for those who make magic tools, magic letters are a kind of property. If it is a magic letter that has not been shown to the public, it is understandable that you are hesitant to show it to us, so of course you can refuse.
"Yes, no, I'm fine there, but ......

　As I said that, I took out a wooden board that I had left over in the item box and carved the word "refrigerator" into it in front of Reinhardt and the others.
　I'm sure you'll be happy to know that I'm not the only one.

"I knew it, ....... Thank you for showing me. Thank you for showing it to me. I promise not to leak any information about the letters I just saw to the outside world.
"Thank you very much. So, did I do something wrong with that ......?
No, it was not your fault. However, it turns out that the magic characters that you have engraved on this magic tool are new characters that no one knows.

　It is true that the characters I engraved on the magic tool are Chinese characters, and it was natural that the inhabitants of this world did not know them.
　Then, Reinhard-san continued with a serious expression.



By the way, Yuya, how much do you know about the handling of magic letters?
Well, ......, I'm sorry, I know very little about them, except that they are necessary for making magical tools.
Then I'll tell you. The magic letters used in magic tools are the letters that we usually use, engraved with magic power. However, some people are able to create new languages or manipulate and carve words that we don't know. In other words, like Yuuya-kun just did. Do you understand that?
Yes.
If you can make magic tools, then you know that there is a limit to the number of magic words that can be engraved on each material. And if you can make magic tools, you know that there is a limit to the number of magic letters that can be engraved on each material. For example, ......, what does this magic letter mean?

　Mr. Reinhardt said, pointing to the "cold" on the refrigerator I had carved.

It means cold or chill, right?
I see. I see. If we were to carve the word "cool" in magic characters, we would need at least three characters, but this character of yours contains all of them in just one character. In other words, you can shorten it by two letters by using this letter. Do you understand me so far?
"Yes.
And here's the thing. There is actually a patent system for magic characters. Do you understand the patent system?
I'm not sure, but if you apply for a patent at ......, it will be officially registered as your property, and if someone wants to use the technology, they can pay to use it, and the person who registered it will get paid, is that right?
"That's right. As you may have guessed from what I've told you so far, by applying for a patent for this useful magic word "cold" to our commercial guild, we can make it widely available to other magic tool craftsmen. So, what I would like to propose to you, Yuya, is to apply for a patent for this magic letter.　That's what I mean. ...... How about it?

　When I heard Reinhardt's story, I didn't think that things would get bigger with the magic letters than with the magic tools themselves.
　And of course, as for me, I have no problem applying for a patent.

I don't have a problem with it, but ...... I don't understand, if I apply for a patent on a magic letter and someone else uses it, will it have the desired effect?　I mean, I know I'm using these letters because I understand exactly what they mean. ......
That's not a problem. I'm not sure if you created these characters or if they originally existed in some region, but considering that they are reflected in the magic tools, these magic characters must have been recognized by this world and engraved in this world with the effect you recognize.
"So, it's ...... engraved on the world?
Yes. I'm not a scholar, and I can't explain the details, but a long time ago, there was a man who created magic letters in a language other than the one we know, and of course not many people could fully understand the meaning of those magic letters. However, when people who didn't know what the letters meant carved them as magic letters in the same way, they had the same effect. In other words, one of the currently known principles of magical writing is that the magical writing created by that person was recognized by the world as its effect?

　Apparently, there's nothing in particular that I need to worry about.
　Instead, there are still many things about magic letters that I don't know, and it might be fun to find out more about them,......, I thought.