On September 14, Jin woke up in the morning feeling refreshed.

He felt more secure in his own house, his own room, and his own bed.

"Father, are you awake?

Reiko, who was waiting in the next room, opened the sliding door.

"Oh, Reiko, good morning."

"Good morning. Soleil and Luna prepared breakfast for you this morning.

"Oh, I see. I'm looking forward to it.

It had been a long time since he had eaten their cooking. Jin rinsed his mouth and washed his face before heading for the dining room.

The menu consisted of rice, miso soup with deep-fried tofu and okara, grilled nori, omelet, natto, and oshinko. The tea was hojicha.

All of them are made with ingredients from Horai Island.

"Yes, it's delicious!"

Jin was satisfied with the taste that has not changed over 400 years.

"Ah, I'm full."

After eating four bowls of rice and drinking three cups of miso soup, he leaned back in his chair, rubbing his stomach.

When was the last time he felt this peaceful and relaxed ......, he thought.

"Father, would you like some more tea?"

"Yes, thank you. Then can I have another cup of tea?

"Yes."

The freshly roasted tea was fragrant and refreshing.

In the end, Jin had three more cups of tea.

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

After taking a long lunch break of about an hour and a half, Jin decided to put into action the items he had been thinking about last night.

"Old man, did you find any clues about the two missing fifth row quintas?

"I see. ...... Okay, please continue your search. ...... I'll be at the workshop. Reiko, help me.

Yes, Father.

Jin went to the workshop to give shape to an idea that had occurred to him under the covers last night.

He searches for the missing fifth column (quinta).

The Golem automata created by Jin are equipped with an emergency device in case they fall into enemy hands, and are designed to self-destruct or automatically erase themselves to prevent the loss of information.

However, it is a different story if they use a "magi emulator. <

Jin thought that, in the worst case scenario, the two bodies might have been "dismantled"...... literally.

In that case, the most important things are <>, >, and >.

However, the < used by Jin is interwoven with Japanese and Chinese characters, so it should not be possible to apply or even convert it without deciphering them.

"But we can't let our guard down, though. ...... uh..."

Jin returns his thoughts that have wandered off track.

"Father, what are your thoughts on this?"

Reiko asks a question here. She has not yet heard what Jin is going to do.

What is Jin's answer to her question?

"If the old man can't find it, then it must either not exist or it must be blocked by a boundary.

He said, "That's true.

"That would be the case. ......"

Reiko looked a little sad when she thought about the possibility of <>.

"But I don't think so. I will not let an inexperienced mage destroy the fifth line of quintas that I have created.

Yes, that's right!

The materials used are of the highest quality. Except for Reiko, there is nothing better in the known world.

Naturally, it is also highly resistant to magic.

<

At this point, Jin changes his mind to go back to his original idea.

"Let's thoroughly analyze the <>."

He realized that although he knew the principle of operation, he had not analyzed it properly until now.

< itself had already been recovered from the golem and the ship that had been secured. Jin immediately set about analyzing it.

* * * * * * * * * *

"Well,...... I didn't get much out of it, but there were some interesting parts,......."

"Father, what is it?"

"Yes, this structure is a fixed magic wave ...... which in this case is mine. It's the only thing that's generating them. I'd make sure it's adjustable. ......Well, let's leave it at that, this generating element."

Jin pointed to a small LED light-like element.

"The base generates the magic wave, modulates it with a modulator in the middle, and adjusts it with a filter. I wonder if this idea can be applied to a magic biased guy. ......"

Jin felt that he was thinking scientifically, even though he was a magician.

However, there was no point in thinking about this point any longer, so Jin changed his mind.

Let's get back to the original work. After all, there was no doubt that the output of the <> was also a free-magic element wave of ether.

Jin spoke up about the fact that he had confirmed.

"To prevent this, it is possible to use a normal magic barrier. But at the same time, there is the problem that it cannot be detected by the Magi Radar.

This was a natural conclusion based on the principles of the MagiRadar. Jin, however, proposed an idea that went beyond that.

"So, we should be able to detect them even if they are blocked by wards.

Jin said simply.

"How in the world can we do that?

"By using <>.

Jin answered.

"The sub-free elemental ether wave cannot be blocked by ordinary wards.

"I see, as expected of your father!"

The old man's voice rang out.

"That's the right answer, isn't it, My Lord?"

<

According to Adriana Tierra's theory, in order to transcend time and space, it is necessary to master the use of sub-free magical element "ether" wave.

For this reason, Jin has modified the old man .......

.

"I knew it. ......You have raised your processing power to be able to handle the sub-free element "ether" wave. ...... about a thousand times more than the original?"

"I suppose it's best not to ask how you did it now."

Jin thought that he had one more thing to do.

Although he did not want to think too much about it because of the time paradox involved, Jin thought that the current old man would be able to use the sub-free magic element "ether" wave.

Furthermore, Reiko's predecessor, the automata, probably also could use the sub-free element "ether" wave, though to a limited extent, to call Jin to her.

"Perhaps the key is energy?"

"I knew it."

The free magical element (ether) that had been collected over 10,000 years had to be mostly consumed in order to cross space-time.

This will probably be the first and last time for Jin to travel through time as he intended. Mainly due to energy constraints.

If he wanted to do it again, he would have to spend tens of thousands of years to gather free magical elements (ether).

In that sense, we should be thankful for the system that has continued to collect free magical elements (ether) in Ars even after it is no longer needed.

"Indeed, you never know what will turn out to be a blessing in disguise, do you?

Jin muttered with a sigh.

Jin guessed that Reiko's predecessor must have had a hard time collecting the free magical element (ether) and mana to connect to the other space.

"Okay. I'll modify the magi radar to use the sub-free ether wave as a carrier wave.

The old man should be able to handle it.

The mana consumed would not exceed space-time, so the magi reactor should be enough to handle the mana.

"You can also emit sub-free magic element "ether" wave, can't you, old man?

<

"Okay, I won't ask how. I'm sure I'll do something when I get back to my own time.

With this reply, Jin started the modification.

Three hours later, Jin, in his element, has completed the <>.