The next day Jin flew to the Kingdom of Elias.

He wanted to meet Marcia and Rodrigo for the first time in a long time, and also to ask their opinions about the construction of the spaceship.

"It's been a long time since I've been here, too.

Elsa was with me.

As we emerged from the warp gate in the sea-eroded cave, we were greeted with the nostalgic colors of the sea.

"It's a little different from Horai Island, isn't it?"

Jin wondered if the conditions were different between Horai Island in the middle of the sea and Potrock at the southern tip of the peninsula.

"The smell of the tide is different, too."

Elsa's nose twitches. Elsa's nose twitches, "It's probably because of the daily life of the people in the Potrock.

< on the side, to Marcia's workshop.

I have already confirmed that she is back today.

"Hello.

"Ah, Jin-san, Erza-san!"

Jeremy, who was tending the store, noticed them and got up ...... tripping and falling on a chair.

"Aitaa......."

Elsa ran to a teary-eyed Jeremy,

"<>"

She cast a healing spell on him.

Jeremy was thrilled.

"Oh, thank you!

Elsa is a bit taken aback by this worshipful tension.

"You're welcome!

She could barely manage to reply, "You're welcome.

"Hi, Jin, Elsa. It's been a while."

Marcia appeared from the back of the room after hearing the commotion.

"It was Reinhardt's birthday the other day, wasn't it?

I'm sorry I couldn't make it." Jin quieted Marcia's apologetic tone.

"Oh, I'm sure Reinhardt doesn't care about that.

"I hope so. ....... So what's the matter with you today?

"Well, I wanted to ask Marcia's opinion on something.

Marcia's face lit up when Jin answered.

"I see!　Actually, there was something I wanted to discuss with Jin, too!

So they moved toward the workshop for a meeting.

"Hello, Mr. Jin, Miss Elsa.

There was Marcia's father, Rodrigo, who was designing a ship.

"Dad, I think it's a good idea to talk to him about that.

"Yes, let's."

In the back of the workshop, a booth is set up for designing and reviewing.

Jin, Elsa, Marcia, and Rodrigo sat around the table.

Reiko stood beside Jin.

"Please have some kuhe."

Golem and Arrow brought the drinks.

"Thank you. How are you doing, Arrow?

Yes, we've had no problems at all.

When Marcia had been in distress before, Arrow had been overstrained during the rescue operation, and had been modified to have Horai Island-compliant performance.

There would be no problem with normal use.

"Well then, let's hear about Jin's story first.

"Well, let's start with Jin's story. I don't know how to start ......."

Since Marcia and Rodrigo could not use , I asked them to read a technical book that the old man had edited for them.

Jin remembered that the book must have included at least the concept of a spaceship, and started to explain it to them.

We are developing a spaceship that can go to the moon.

But these words left Marcia and Rodrigo speechless.

"...... to the moon......."

That was all they could manage to say.

Both Jin and Elsa remained silent for a while, considering their feelings.

When the second cup of kuhe was empty, they finally restarted.

"I thought I knew that ...... Jin was out of the ordinary, but I never thought he would go to the moon.

"I couldn't believe my ears even when I heard they launched something called <>."

"It's your father."

Reiko then made a well-timed interlude.

"Well, I'd like to hear your opinion, right?"

The four of us rearranged.

"I guess we could liken it to a ship that goes out to sea and doesn't come back for a long time.

Rodrigo's idea was novel to Jin.

"I would like to see Marcia's face," he said.

"And, Dad!"

But Jin took it in the form of a <.

（I see...a communication device that can definitely communicate with ...... on the ground, or rather with Horai Island. In any case, it should be able to send not only voice but also images <...... for relay in some cases).

He will make use of his knowledge in modern Japan and sublimate it into an idea that can be realized.

"After all, I would like to have a nice meal once in a while.

"Oh, yes, that's true.

If you only eat meals that prioritize nutritional balance, you will get tired of it. Although he had not yet decided how many days he would be in space, Jin thought it would be good if he could have at least one meal a day with such a menu.

"As for me, I'd like to see beautiful sunsets and sunrises when I go out to the sea, wouldn't you?

Marcia said. From there, Jin decided to build an observation deck where he could see the universe with the naked eye.

"And ...... I get bored when the weather is bad. ......"

Jin felt the necessity of the recreation room.

The old man would know what needed to be done through Reiko, but Jin himself took notes with his own ideas.

After that, he finally decided to consult with Marcia and the others.

"Thank you. That was helpful. Now, why don't you tell me what Marcia and the others want to talk about?"

"Yes, I'll get right on it. ......."

Marcia then tells Arrow what to do. Arrow left the booth and came back soon after with something in his hands.

Arrow places it on the table.

"I want you to look at this," he says.

"What's this?"

The object placed before Jin's eyes is a cylindrical object. An axis extends from the center in one direction.

"You called it a 'magic rotary device', right?"

"<>?"

Jin parrots the words, but his eyes are glued to the device.

(Motor or ......!)

"The <> was a little too slow to drive the screw, so some magical craftsman invented it."

The name seems to have been forgotten.

"Fumu ......"

Jin examines the function of the device without taking it apart.

"Hmmm... it has a rotating axis inside, and you use wind magic to turn that axis."

In principle, it is similar to the that Jin had created earlier.

"But, this is not enough torque, is it?"

Jin, who knew of its shortcomings, said, and Marcia and Rodrigo nodded.

"That's right. It's a little too big a screw and it won't turn."

"With the golem-driven machine, the rpm is a bit short. It's kind of a pain in the ass."

"Hmmm... ......"

Jin has already developed a jet thruster. In other words, he has jumped from outer-wheel ships to water-jet propulsion, so in a sense, he is in a vacuum.

"This is not good.

It was Jin who began to think seriously about this.