Dungeon Builder: The Demon King'S Labirinth Is A Modern City
Chapter 1: The Devil King's Job

「But, you still don't believe me, huh? Well, you won't understand when I suddenly say you're the Demon King, right? How else, huh? I will give a demonstration. What kind of thing is a Demon King. 」

He smiled wryly and turned around, 【Beast】 Demon King Marchosias, also known as March, and I followed him.

Although her appearance was only that of a beautiful white-haired woman (with wolf ears and tail), there was something that made you believe that she was the Demon King.

He took me to a narrow room.

When I looked into the mirror leaning against the wall, there was a boy with a handsome face in the middle of his teenage years. No way, it's me?

Surprisingly, there was an uncomfortable feeling.

And, in the center of the room, a round crystal was placed on a white pedestal.

As I silently tried to grab the crystal, March grabbed my hand.

「Please don't touch it. That crystal is my own life. If it breaks down, I will lose all my strength as a Demon King. 」

「 You're going to die? 」

「 Well, even though I said that, I didn't mean it that way. I will not be able to create demons anymore, the demons I created will all disappear, the dungeon disappears and I will lose my unique skills. Although there is life, as a Demon King, I am as good as dead. 」

I am a little relieved to hear it.

But I also felt uncomfortable at the same time.

If, as he said, then, since I am the Demon King, somewhere, my crystal exists.

Since I currently do not know the location of the crystal, and the power of the Demon King is lost if it is damaged, I cannot remain calm.

「Hee, you feel the danger from the short comment earlier. You're quite perceptive. But, you don't have to worry. The crystal will appear after you create the dungeon. Conversely, for those of you who do not have a dungeon, it does not exist ..... 【Mantra】 」

A large book made of parchment appeared in his hand.

March slowly opened the book.

「We are in the deepest part of my dungeon, although I plan to make it comfortable, I wonder if its appearance gives that impression.」

After saying that, a hologram appeared on the crystal.

It showed a beautiful but terrifying castle.

「Although I say dungeon, his appearance depends on the Demon King. There is an ordinary type of cave, but something like my castle is also fine. You can also choose the forest. You have to decide what kind of dungeon you want to make now to prepare yourself when you become independent. 」

「 I can't understand the things you said just now. What do you mean by being independent? 」

「 Aah, I forgot to say. For a newborn Demon King, they would study under a senior Demon King for one year, and they independently made their dungeon after that. In other words, I was your guardian for a year. Therefore, I will kindly teach you like this.

Shamelessly say that when you suddenly make a blue wolf.

「Alright, let's prepare how to make a dungeon. Repeat after me 【Mantra】 」

「 Yes, let's see, 【Mantra】 」

A book appeared in my hands.

I naturally opened it.

Then, there was a written page about the creation of the dungeon.

「From the list there, choose the one you like and combine. First is the exterior. It was a sight that could be seen from the outside. Choose something that suits your preference. Its interior has distorted space-time. My dungeon was much wider than anyone else saw outside, filled with many levels. 」

I turned the page smoothly.

As he said, there were various appearances provided. There is a DP written on all the pages.

「What is this DP?」

「Poin Dungeons. That's what we gathered the Demon King so much. You can trade DP for various things and get what it says. In comparison, an exterior that suits my taste is expensive. But, the performance has not changed. However, for the interior, I wonder if its efficiency is up to the cost. 」

「 Interior? 」

「 For that, wouldn't it be faster if I showed it to you? 」

「My underground prison is a level type basement, the higher type. One floor was divided into three rooms, so I bought three rooms. For the first floor of my basement, I bought a cheap stone corridor. 」

As he said, there was nothing but a winding road made of stone.

「At the top level, I bought a room with expensive traps, but there is nothing like it on the first floor.」

When I saw the hologram, there was a human fighting the kobold.

The Kobold is a canine demon that can walk on two legs.

Compared to the blue wolf Garm I fought, he looked like a puppy.

The man defeats the kobold, and performs a "guts pose".

The view changed again. The next scene was a man who showed greed to pick up a treasure chest.

「Why don't you use something like the blue wolf I fought a while ago? If it was to fight someone like that man, who had a melee fight against a kobold a while ago, there was a high chance that he would be easily killed. 」

I don't understand.

If you are thinking of exorcising an intruder, you should place the powerful demons that you created on the first floor.

"That's impossible. DP is the life force of man. Strong emotions such as fear, despair, and greed are very favourable. By gathering the people in this dungeon, the DP will flow into my hands. Although I would receive a lot of DP if someone was killed; when there was a powerful demon in the beginning, not many humans would come. That's why it's best to place a demon that can defeat them moderately, right? 」

「 Was the treasure chest some time ago also a bait to make humans gather? 」

"Fuckin' thick! Exactly like that. By the way, people came here to become stronger. They became stronger through leveling up by defeating demons. They obtained the treasure, became stronger, then returned with a feeling of satisfaction. On the other hand, the Demon King got a DP; everyone was happy. Incidentally, powerful demons were placed at the top level because the XP obtained from them was higher. I also benefited from the DP obtained from strong humans. If you set the demonic power from the lower level to the upper level, you can collect a lot of DP from the weak and strong humans you gathered. 」

I see, so that's the plan.

In order for the Demon King to obtain DP, they had to be welcomed.

「If that's the case, the treasure is arranged violently, and the powerful demons are ordered to lose on purpose.」

「I don't do that, you know? After all, the treasure arrangement was something that was exchanged for DP, and that demon was also not free. While many people had come to take it, this was the perfect time for the Demon King to become a black heart– right? If by chance, someone reached the deepest part, it was the end if the crystal broke or he would be killed. This unexpectedly takes a lot of effort. Demon Lords usually buy rooms filled with expensive traps for the last level as I did; fields that were profitable for myself were also ready to compensate. 」

I swallowed my saliva.

I learned from the difficulties and pleasures of the Demon King's work.

But I have one question.

「We use human emotions as food, don't we? And even though you said to use demons and treasures as bait to gather people, why would such an inefficient thing have to be done? 」

To my question, March tilted her head.

「What do you mean?」

「Well, to gather people and let them live, in my opinion. Instead, stop the dungeon and make it a city. Then, you should be able to get DP for 24 hours. 」

As I said such words, March laughed and raised her voice.

「That makes sense, but it's hard. The efficiency of getting DP increases when strong emotions come out. The battle of life and death. The pleasure of getting treasure. Fighting is the most efficient way to get DP. 」

「 Really? That may be the case if you look at them one by one, however, if 100 times people live for a long time, the efficiency might change, right? 」

There is a desire within me that does not want to kill others for a reason.

Is it related to my lost memory?

It is contradictory that I am a man who can calm down even though I am holding a gun.

「Maybe so. If that's the case, it might be best if you aim to become a Demon King like that. Just the fate of the Demon King, that was the way of the Demon King. You are ready to walk your way. 」

「 That's right, yeah. I'm gonna do it. However, I want to study properly before that. Until now, it was just an empty dream. 」

「 Good mental attitude. Since I have already shown you how to make a dungeon, then I will show you the creation of the devil, in a sense, the real pleasure of the Demon King. 」

Satanic creation.

How was the devil created? My curiosity was disturbed.