I Became the Demon Lord and my Territory is an Uninhabited Island

"Mr. Urle. I'm sorry, but please work at the office for a while to take over Rush."

Rush's stomach became quite noticeable and for the time I asked Urre to prepare for the takeover. I said that it was the end of the year and the next month, so it will be about five or six months.

I have my own will, but I personally want to go on vacation as soon as possible. Latte had been helping the farmer even in the ninth month. It's really unknown if it's a racial difference or an individual will.

At worst, my cry may come in, and Keith may cry asking to say.

"I see. Is it okay from tomorrow?"

"Oh, no problem. And I'm off tomorrow. So let's go up today."

Once Urle has taken over Lusch, he will be the assistant (I), and will be the representative immediately. At that time, the two children graduated from school and became adventurers, and we and the couple emigrated to the island.

You may build a house that is just a bit bigger, the name of the former representative's home.

The post is almost home because of the goodwill of the islanders. It's completely private, but you have to be a little dignified to show it. I'll draw the drawing later and have Oda san copy it. I transfer to my home with a bad smile.

"I'm home"

I go to the living room, sit on a chair and smile a little.

"Welcome. Looks good."

"Hmm? I understand ??" The man who is assisting me is the second son of a slightly larger merchant, so I raised myself to be a modest assistant, and my plan was until I could enjoy it. It's working in secret. ''

"Yes, tea. I would like to reduce the difficulties of Calm so far. I was struggling with plainness."

He looked back a bit and said that there were nearly 200 people on the island, including demons and races.

"There are more than the neighboring villages around here, right?"

"If you look at it as a whole, then dividing two hundred by four, how many people are in one village?"

I immediately gave Lily an arithmetic problem.

"Hmm?? Fifty?"

Don't worry, I wanted a non-questionable answer. Well, it seems that you can calculate money a little, so it will not be deceived.

"Well, it was difficult to pick up one village or accept a large number of people as requested by a hero, but one village is like that.

After taking a bath after dinner, lily of the valley came in. rare…….

"Lilly, I'm starting to cook a little easier."

"Hey. Is the fried egg effective?"

"I think it was a shock for me. If anything is said, help me."

"Of course. I'll teach gently from the fried egg. Since you've beaten me once, have you tried cooking?"

"I might have hated being less girlish than my father, because you can sew calms and cook well. You think you can get used to cooking because you can cook every day, right?"

"Ah, sure. Looks like a really girl? It's feminine, but the content is the same as the guy around it. Shinken is still better at cooking."

Lily of the valley finished washing her hair and body, and came in facing a narrow bathtub.

"Hey.-In the next spring, the kids will leave our nest to become adventurers. Do you think you're the second one? Latte also wants.

Lily of the valley heard shyly, looking up.

"That's right. I really want it, and if lily of the valley and Latte get used to the heat over there ... maybe?"

"... I see. That's okay. Latte is waiting in bed. Let's get out early?"

"... I can easily imagine the future development-

The moment I said, Lily of the valley grabbed my wrist and was forced out of the bath.

"No, I won't run away. Let's calm down the lily of the valley, soak in the hot water and relax a little. I'm not soaking in the bathtub at all !?"

"Is it up already? Do you sit again?"

"The theory is a bit strange."

I just wrapped my towel and was taken to my bedroom.

◇

The next day, I decided to teach magic study after lunch. Why? Because the children have beat me, my mind has changed a little ...

"Do you both know what is fast?"

Even though they were supposed to study magic, suddenly they were told that both of them opened their mouths halfway and stopped thinking.

"Well, say something."

I asked the children.

"Is it an arrow or a crossbow?"

"Is it a horse or a bird?"

"Both are off. The answer is sound."

Well, light is faster, but conceptually it's still impossible in this world.

"What? Dad, what are you talking about?"

"Yeah, do you drink alcohol during the day?

The children's reactions pierce the heart. Well, it's like this.

"Voice ... I mean, the sound comes to the other's ear by the vibration of the air. How fast it is, while a person walks one step, the sound is 340 steps away By the way, the arrow is about one hundred and forty steps, more than double the arrow. Of course, the distance reached depends on the loudness of the sound, but there is a unit called sound speed. By the way, one hundred thousand sun just tilts the sun It's the speed of a step. ''

To explain, the children are surprised and the brides who heard Nico Nico are surprised.

"Thunder is another good example. You can tell how far you've fallen by counting how long it's glowing. It's close if the glow is right, far away if it's too late. If you hear the sound before you count five, you want to escape indoors because it's dangerous.If not, squat down in a place looking up a little from a tall tree.If it's outside, it's safest. It's dangerous because you come to me, don't run under the tree. ''

"Yes" "Okay"

If you take thunder as an example, it really deviates a little.

"The faster things move, the more air walls are formed. It's like a stormy wind. It's pretty hard to walk in the headwinds. If it is strong, it will fly like a kite. "

I stand the wooden board on the table, take out [Wind] from my hand, and knock it down.

"This is when resistance is high. Next is-"

This time, on the wooden board, reduce the area receiving the wind in the vertical direction, and give the same [wind] as before

"If this is low resistance"

Since it is placed vertically, the area that the wind hits is small, so it does not fall.

I drew on paper a picture of what happens to the air wall as I move faster. Well, I just draw an arc.

"If it's fast, it becomes like this and the resistance becomes stronger. What do you do? You need to sharpen it to break through the air wall. Why is the shape of the arrow sharp? Because it is to eliminate resistance."

I draw squares and cones. It's actually better not to be a cone.

"Are you okay with that? Isn't there any special way?"

Latte looked curiously, looking down at her eyebrows.

"The faster you get, the thicker it looks like a wall. You have to sharpen it to break through.

I make [water polo] at my fingertips.

"If resistance is strong, it will collapse if it is soft."

When a water polo was launched into the open window at the speed of a bomb, it spattered in the air, sprinkling water on the ground.

"If it's too fast, even hard objects will break like water.

And if you create something like an arrow with [Water] and eject it, it will fly farther and scatter.

"It's so different in shape. Miel has been giving out a sharp stone (stone needle) during this time, but it's actually quite reasonable."

However, if you are too fast or have a strange shape, you will lose the air pressure.

"Fast, invisible--"

Miel mutters such a thing and is thinking about something. Well, you should worry. If it can be done in a wind tunnel test, it will be different in various ways, but I will not do it.

"Maybe the magic you can't see is done with a very small thing?"

If you give such a hint, do you end up with the answer?

"Yes, I can't tell you the material, shape, and speed."

I raise the left corner and tell me that Miel's answer is somewhat correct. After that, I can't teach you how to make it fly straight, or anything else. Please worry at best.

After the sound lesson, she went outside and practiced, but Lily gave up on the haste and started practicing throwing knives. Miel has an image while saying something with grumble.

"You guys, there's a turret there? About five hundred steps away? Float an iron plate and hit magic. If the plate moves, you'll hear the sound late, so watch it carefully Ro

I floated the [iron plate] at a considerable distance from the tower and fired the [iron bullet].

"This is the speed of sound. Did you hear it late after the iron plate moved? I think it is a bit difficult, but this is the invisible magic that Miel cares about."

"Even if you say the speed of sound ... it's difficult."

"I can't do it"

Lily seems to give up just to see. You can show it like a sonic boom, but it's definitely annoying around you.

"In addition, being faster than an arrow is the same or more powerful and flying. When practicing, do it in a place where there are no people around. Same as crossbow practice, did you understand? "

"Yes, yes."

He told him to gaze a little, and then shot [stone bullets] at the pig skull he had prepared, and the area around his head blew off.

"Even a pig's skull can be blown away easily. Think of it as a demonic or a human being. If you're not going to kill it for sure, don't you carelessly aim for the key points.) Why? ”

He looked closely at Miel's eyes and told him to scare him a little. He then smashes the pig's skull, which was left rolling on the ground, into pieces using [Shot Shot], further threatening.

"The speed of sound means that the head of the gogoblin can be blown off if the conditions are right. If you use strong magic, you have to be prepared and responsible with a certain degree of responsibilities.

"Yes!"

"It's my last resort, I don't have any esoteric designations, but don't tell anyone? I'll go to the forest and practice. Lily's going to the forest because throwing knives are dangerous."

After that, they went to the forest for training.

However, if I taught a little tricks, I was surprised at my father that the knife began to stick more and more from the tenth throw.

Besides, I'm going to produce obsidian knives and throw them in succession, and my dad is about to cry ...

I'm really specialized in melee attacks.