Jin's prediction was wrong.

What was it about, I mean, Rubina?

Because of the time difference, she had been awake for a long time, and she could not overcome the urge to sleep.

She started to doze off while chatting with Jin and the others.

"Ah, you are still a child after all..."

Suzanne smiled as she gently picked up Rubina and carried her to the guest room Jin had designated.

"Is Shu okay?"

Jin was concerned about Shu, who was the youngest after Rubina.

Yes, I have to admit that I am getting a little sleepy.

Natalia asked,

"Actually, I'm ...... too."

Trihart did not say anything, but she still seemed a little sleepy,

"Well, let's call it a night," Jin declared.

Jin declared, "Well, let's call it a night.

The next day, at 5:00 a.m.

The next day, 5:00 a.m.. Jin woke up earlier than usual.

He woke up earlier than usual because he thought that Rubina and the others would wake up early.

He was right. Rubina and Shu were already awake, and Natalia, Trihart and Suzanne were soon to arrive.

"Ha, we are all the same, aren't we?

"Yes, we are all the same.

Even Trihart and Suzanne woke up and everyone laughed at Jin's words.

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

After breakfast, we drove the Golem car to Tatsumi Bay.

"Now we're going to race cars, right?　...... but cars don't seem to be common."

Jin asked himself.

"I don't want to cause a car accident......If we race, accidents will happen......."

It was a difficult question and he arrived at Tatsumi Bay with no answer. Jin turned his head.

"Now, this is the ."

"Wow. ......."

The ship has a streamlined hull that doesn't look like much of a ship. It is black and white (matte silver-white) in the image of an orca on Earth.

"Come on, let's get on board!"

Jin takes the lead and climbs aboard. Reiko and Edgar followed.

Edgar, I'll be counting on you.

Yes, sir. I'll take care of it.

Edgar really used to be a pilot.

Shu was impressed to see Edgar sitting comfortably in the cockpit.

"Hope, I'm sorry."

Jin called out to Hope as he saw her off at the pier.

"No, don't worry about it. Mr. Edgar, please take care."

After such an exchange of words, everyone was on board.

The orca started and immediately began to dive.

"Wow! ......"

The underwater view through the window caught everyone's attention.

"We've only just started diving," Jin says with a wry smile.

Jin said with a wry smile,

"Because it's my first time.

Rubina replies, "Because it's my first time.

The orca dives rapidly.

"How do you dive?"

Natalia asked.

"When we are sailing we trim the fins to generate downforce, but in this case we are using the <> to make the hull ...... in this case the bottom. By making the ...... heavier, we're making the specific gravity of the whole ship a little bit heavier than seawater."

The heavier hull bottom also provides better stability, Jin added.

"Jin-sama, how is the inside oxygenated?"

Shu asked.

"In short, the oxygen is separated from the carbon dioxide in the air by engineering magic .

"I see!　That's very informative.

< had already dived to a depth of about 10 meters.

"Ah!　What is that?"

Rubina exclaimed as she saw a luminous object outside the window.

"Ah, it's the <>. This time we are going for an underwater walk, so they are following us with their lights.

If we go too deep, it will be too dark for the sun light to reach us, and Reiko and Edgar, but not Jin and the others, will not be able to see anything. That would be meaningless, so they are accompanying us with lights. There are ten of them in total, by the way.

Oh, that's what I meant. ...... Oh, fish!"

Rubina is excited to see the fish startled by the lights and run away.

"We're getting close to the bottom!"

Tatsumi Bay is getting deeper, but as we are still close to the shore, the depth is only about 20 meters.

"Oh, beautiful fish!

"Is that a plant? ......Oh, that's seaweed, isn't it?

Yes, that's it. That fluttering thing is wakame seaweed. It's delicious in miso soup.

"Is that so?

"That's the one over there. It's the one they use to make agar-agar."

"I love anmitsu!"

"That one over there with the fine leaves is hondawara. It is used to make salt.

"I see."

"That big, long thing over there is kelp, which is dried and used to make soup stock or boiled and eaten."

"So there are many kinds of kelp."

The underwater walk seems to have been well received. <

"The ocean is getting darker and darker.

That's why we have a mermaid squad.

"Oh, there's an interesting creature."

An arthropod like a hawksbill crab was moving. It has 12 legs. Jin had never seen this kind before.

"It's called a dozen crabs."

Reiko explained. I think the name comes from "a dozen pencils," which means 12 pencils. Jin thought to himself that he was probably the same person he was 400 years ago.

"Ah, a big shell!"

"It's a "shako mussel", isn't it?

Jin thought it was a terrible name, probably because it looked like a giant clam.

(I bet there must be some reason why he couldn't be bothered to think of a name for it. ......)

Jin guessed almost exactly what he was like 400 years ago.

"There are also mineral deposits on the seabed."

Reiko explains.

Everyone seems to be satisfied with this underwater walk, and Jin is also satisfied in that sense.