After the 3 o'clock tea, Jin asked everyone he had invited.

"Well, there is still time for dinner, so if there is anything you want, I will ask you. If not, I would like to have you relax in the hot spring.

"Well, you still have tomorrow, don't you?"

Rubina was the first to ask.

"Yes, that's right. With the time difference, tomorrow night around 7:00 p.m....... after dinner, it will be 7:00 a.m. on Onogoro Island."

"...... I'm going to have a hard time sleeping."

As a child, Rubina is not a fan of sleep deprivation.

"If you are sleepy, take a nap for half an hour, and if you sleep early at night, you will be less likely to get jet lag.

Jin advised.

After that, since there seemed to be nothing else they wanted, they decided to soak in the hot spring and relax, and chat until dinner.

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

"Hmmm..."

"So this is a hot spring. ......"

"I've been to a few of these in other places, and they are very nice.

Jin, Shu, Trihart and the others were in the men's bath. Trihart had been to the outside world many times because of his position, and he had been in hot springs before, but Shu had never been in a hot spring before.

"Are there any hot springs on Onogoro Island?"

I recall that it was not a hot spring that Hitoshi took a bath in on Onogoro Island.

"I wonder if it's possible to dig underground on Onogoro Island.

If you dig deep enough, you might be able to find geothermally heated groundwater,...... Jin thought.

"It could be that they decided that a regular bath would be sufficient without going that far."

Or maybe he didn't like the quality of the water, Trihart added.

Some people do not like the smell of sulfur and cannot enter sulfur springs, while others have weak skin and cannot enter acidic springs, so it is also true that not everyone likes them.

In reality, it is the underground structure of Onogoro Island that is the main cause of the problem, Jin imagined, albeit vaguely.

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

Rubina, Natalia, Suzanne, and the others came up 20 minutes after Jin and the others.

The time was 4:30 PM. Since dinner was scheduled for 7:00 p.m., we decided to have a glass of cold fresh juice after the bath.

"Wow, this is delicious!

Ramon juice with carbonation. Not too sweet, but refreshing with just the right amount of acidity.

"You're probably used to drinking coffee milk over there," said Jin.

Jin said.

"That's true. Too much of something sweet and you won't be able to eat dinner, so it's just right.

Suzanne agreed.

As dusk was falling, a peaceful time was passing in the dining room of Horai Island.

Dinner consisted of white rice, miso soup with deep-fried tofu and okara, grilled dried horse mackerel, sweet omelet, hamburger steak, pickled vegetables, and tempura.

No alcohol because of the children.

I love hamburgers. ...... and this sweet omelet!"

Rubina seems to like the sweet omelet very much.

"Oh, this dried fish is very ...... flavorful."

Trihardt is amazed by the dried fish. Seeing this, Jin asked him what he thought.

"Don't they make dried fish on Onogoro Island?"

The answer to this question was, "Yes, we do.

I asked him how they do it, and he told me that they bleed the fish they catch, open them, and then dry them by magic.

"It's quicker and it doesn't attract insects.

Jin heard this and thought, "Ah, that's why.

"Oh, that's why."

"Yes?"

"Dried fish is not simply dried. Dried fish is not just dried fish, it is dried fish that has been exposed to the sun so that the proteins break down and become amino acids, which give the fish its umami flavor.

Suzanne nodded repeatedly as if impressed by this explanation.

"That's right!　It's not just a matter of doing everything in a short time. ......"

"This salt is delicious!"

Natalia said that the salt poured over the tempura was delicious.

"Don't they make algae salt?"

"Mashio?"

Her reaction revealed that they did not make it.

"Oh, the inland sea of Onogoro Island has very little seaweed.

Perhaps because of the coral reefs, there is not much seaweed. The water is clean enough to make good salt from the sea, but it is a step behind seaweed salt when it is used for tempura.

Jin then explained how to make seaweed salt.

"Oh, you add the umami taste of seaweed to it," he said.

"Yes, it does. The animal umami is inosinic acid and the vegetable umami is glutamic acid ......, right?　Well, it's not so much the name as the effect.

As expected, Jin had a vague recollection of this part of the story.

"Seaweed itself is not so abundant, you know."

Jin looked at Natalia, who looked a little disappointed,

"Good. Tomorrow we will go for a walk under the sea.

"Tomorrow we'll go for a walk under the sea," she declared.

"Yes?"

"A walk under the sea?"

"Yes. It's a submersible I built called Orca.

It is 10 meters long, 3 meters wide, and seats 8 people.

The outer panel is made of two layers of 64 light silver and the shell of a gigantopod. The inner surface is coated with soft magic resin to prevent water leakage and for emergency repairs.

It is powered by an aqua-magic propulsion system (aqua thruster) and a force field generator (force generator).

It is armed with two underwater magic cannons (for torpedo type shells), a magic bomb (mana bomb), torpedoes, and many other weapons.

On the magic screen installed in the wall of the cafeteria, the old man wisely displayed the drawing of the .

"...... is amazing."

"This is also very ......"

"That's great, Jin-sama!"

When I explained the specs to him, he was astonished and respected me.

"It's an eight-seater, so ...... Edgar will be the pilot again, and me, Reiko, Rubina, Natalia, Shu, Trihardt, and Suzanne ...... will be perfect for the job.

Unfortunately, Arrow, Donner and the others will be away.

But Jin didn't need to persuade them; they all agreed that it was inevitable.

"I can't wait to ride it!"

Rubina couldn't wait to get on the boat.

"...... tomorrow, right?"

Jin nailed her to the wall.

But Rubina might be too excited to sleep tonight, Jin imagined.

Yes, like a child who has an excursion coming up the next day.