Girl in the Box: Please tell me why I was reincarnated as a mimic monster!

That period was rather dark... The demons back then weren't mature enough, and their killing was almost indiscriminate. Until they summoned a hero. Ha, a hero, what a mocking word.

The hero, representing humanity, defeated the Demon King, who represented the demon race, and drove back all the demons, reclaiming the human world. The demons, meanwhile, could only return to their own territory.

However, they recently welcomed their new Demon King, a very powerful and somewhat strange Demon King.

The demon king, naturally, led his demon race to fight back. Moreover, under his rule, life in the demon realm was even happier than during its heyday.

The above is entirely the personal evaluation and summary of the fairy Silena. She is currently inspecting the Demon King's castle, having been dispatched as the Demon King's confidante for a very... absurd reason...

"This guy is incredibly lazy..." Serena knew this demon king's style of doing things very well.

If there were any humans here, they would definitely exclaim in surprise.

Fairies are sentient beings who were once invaded by demons and faced extinction. Logically, she shouldn't be in demon territory, yet she's now strolling around the streets without a care in the world.

It's not that no demons noticed her; fairies are creatures that constantly radiate magical light. They are small, like tiny butterflies, with thin, glowing wings. They are extremely conspicuous, so it's impossible for them not to be discovered.

"Oh! Dear Serena!" A stone golem who runs a gem shop greets Serena. "Out on patrol again today? The Demon King's confidant is really working hard."

"Ha... to be honest, I'm thinking of going on strike right now." Sleina smiled wryly and flew to sit on the stone golem's shoulder. "Uncle Stone Golem seems to be doing pretty well in business today."

"Oh, hahaha, you figured it out?" the stone man laughed. "How about coming in and having a seat? I have some magic stones here."

“Ah, please sell it to me.” Serena said without hesitation.

"Okay, just a moment."

The stone golem led Sleina into the shop, then gently picked her up and placed her on the glass-encased counter—one of the technologies the Demon King had brought. Previously, she would be locked in a treasure chest with a tag and price tag hanging outside, only being shown to customers after they had made their selections—a very inconvenient process.

The stone man went behind the counter, took out a small wooden box from under the counter, and placed it in front of Serena, opening it.

"I've already ground the magic stones into powder beforehand, so it'll be easier for you to use." The stone man picked up a small amount of magic stone powder and showed it to Sleina, then helped her put it into her bag.

"Okay, thank you." Serena picked up the bag and flew away. "Please send the bill to the Demon King."

"Yes, come again next time." The stone man smiled and watched her leave.

That's roughly the feeling. Here, no demons would harm fairies, so Serena isn't worried about such things at all.

boom----!

"Whoa?!"

A tremendous roar came from afar, the ground trembled slightly, and the demons who could sense it all raised their heads and looked toward the source of the sound.

There, a huge mushroom cloud rose.

Most demons glanced at it and then went back to what they were doing. Some demons treated it as fireworks and enjoyed it, but there were probably only two in this demon territory who truly knew what it was.

Serena and...

"Demon King—! Something terrible has happened—!"

After returning to the castle, Serena rushed straight to the Demon King's room. It's a wonder how her small body managed to break through that iron door.

"Tsk...hiss...I even cast a locking spell...how come you were still able to break in..."

The person who had been sleeping on the floor got up after Serena rushed in. He had black hair, black eyes (with very dark circles under his eyes), and a somewhat thin appearance. He had thrown his black coat and cloak aside and was using them as a blanket.

Speaking of which, the clothes worn by the first Demon King were way too big... What a waste.

“I’ve already figured out your spell! It only takes a second to undo it!” Serena said confidently, standing on the person’s head.

"Tch... I shouldn't have shown you those things..." the person clicked their tongue. "So... this is the big thing you wanted to tell me...? Well, I'm going back to sleep..."

"No, no! That's not it, you idiot! Don't go back to sleep!" Serena hurriedly grabbed his hair. "Xuanze! Get up right now! The kingdom has been bombed!"

"It exploded...?"

Xuanze, the guy sleeping in the office, is the current Demon King, but he's actually human. Hearing the news of the kingdom's destruction, he became slightly interested.

"It's good that it's blown up...it's one less enemy..." After saying that, Xuanze lay down again.

"That's not true, you bastard! Mushroom cloud! That's a mushroom cloud!" Serena tried her best to wake Xuanze up, plucking out strands of his hair one by one.

"Huh...?" Xuanze looked up. "What did you say...?"

Although he was still half asleep, he could finally listen properly. He used magic to shield the room from all interference from the world, so he had no idea what was happening outside while he was sleeping.

"In the kingdom, over there, there was a mushroom cloud and an explosion!" Sleina explained to him incoherently.

Xuanze frowned, then unfolded a magic circle and displayed the image of the explosion location. It was faster to see it himself than to listen to Silena's description.

"I see...the people over there..."

Xuanze watched this scene with his eyes half-open. Of course, he knew why this was happening and what had caused it.

"This is interesting... but let me sleep a little longer..."

"Don't sleep, you idiot!"

☆、I've been taken care of by the Dragon King!

Prologue

Wow...that's really amazing...

I am Leon, an adventurer. I accepted a quest related to a dungeon, so I went into the dungeon today. On my way back after completing the quest, I witnessed a scene I would never have seen before in my life.

"Damn it, what the hell made this thing?"

Ah, yes, it's a hole, a really big hole. I wonder who did this, they're really something, they just ripped a huge hole into the maze. Seeing the twin moons right inside the maze, this is the first time I've ever experienced that.

I don't know exactly how big it is, but this area is filled with a strong stench of blood. This is no place for humans to stay; it's already the domain of undead monsters.

And there are bonuses too...

I already have a headache before I even went in. Wow, the smell is so strong. I'll have to use a scarf to cover it up.

I walked down with the smell covering half my face, but it was still incredibly strong. I felt like I was about to collapse.

But that's not all the trouble we're facing...

At that moment, something pierced through the charred lava, and protruding from beneath it was a charred hand bone. It grabbed the ground and then crawled out.

"Tsk... Blood Skull."

Blood Skulls are troublesome monsters, a relatively rare type of necromancer. What's most terrifying is that they are cursed, and even B-rank adventurers would need some time to deal with them.

However, having exorcism-related items would make things easier; silver items would also work. But I never expected to encounter such a monster.

After the blood skeleton climbed onto the ground, a large group of undead creatures followed, all staring at me menacingly, making me feel like I was facing an entire army.

Damn it, why am I so unlucky?

I'm all alone here, and there are so many undead, I can't possibly fight them all. I really want to turn around and run away, but now... something terrifying is running up behind me.

Scorching Thunder Wolf.

I won't go into too much detail about this thing; it's similar to a regular wolf, except that this bastard can use lightning magic.

Damn it, I can't escape this time. Father, Mother, please forgive Leon, I should have listened to you and become a chef.

But not now... I'm almost dead... If there's an afterlife, I won't be an adventurer again.

Click, click, click, click.

The sound of bones clashing filled my ears as they surrounded me, wielding bone weapons. The Blazing Thunder Wolves stood poised to strike, but they certainly wouldn't come over until I and the undead were both badly injured.

I gripped my short sword tightly, preparing for a desperate battle with the undead army. If all went well, I could hold them off and break through this place, and probably wouldn't be chased by the Blazing Thunder Wolves anymore.

As I was still thinking this, the Blood Skull had already led the charge, swinging its bone spikes and smashing them down. I was so startled that I parried with my short sword, thankfully avoiding a direct hit.

Led by the Blood Skull, the other undead creatures also began their attack. Suddenly, a whole host of weapons were swung at me; I only had a short sword, and I certainly couldn't withstand so many attacks.

"Cough!?"

Suddenly, a bloody skull appeared behind me. Before I could see it, it struck me with a hammer. The blow landed squarely on my back, breaking my ribs. The sharp pain of the ribs piercing my lungs made it impossible for me to breathe.

Then a bony hand reached out from the ground, grabbed my foot, and threw me to the ground. Then, those damned beasts surrounded me and raised their weapons, ready to finish me off.

After that, I became one of the members of this army.

Thinking this, I closed my eyes, waiting for the moment my life would end. But no, something saved me.

Click click click click click—!

This time, it wasn't the sound of bones colliding, but the sound of bones shattering. I opened my eyes and saw a light blue shadow charging at high speed among the undead army.

Each time the shadow collided with the skeleton soldier, a magic circle would appear, spraying water blades that would directly sever the skeleton soldier's head, while simultaneously shattering it completely under the force of the impact.

The shadow crashed through the army, growing faster and faster, leaving only afterimages and a pile of shattered bones. It was overwhelmingly powerful, and the undead around me were wiped out in an instant.

What about the two blood skeletons?

What I saw was a treasure chest, from which claws and crab legs extended, one of which gripped a blood skeleton. The blood skeleton, of course, didn't care what was holding it; it simply swung its weapon to attack the treasure chest.

Then, it was crushed by the treasure chest, and all of them were crushed and ground to pieces in one go, so that they couldn't even use the bones that were restored. How skilled they were!

After it finished off the blood skeleton, the shadow crashed back, and the treasure chest caught it steadily. On top of the treasure chest was a slime.

Since this treasure chest is dynamic, it proves that it is a monster—the 'Adventurer Slayer' Mimic.

Hey, hey, hey, a mimic that can kill a Blood Skull? Is this the same slime from the rumors? It's way too strong! Why did I have to run into something like this?!

The slime spotted me, tapped the mimic's shell, and the mimic turned around, glanced at me, and then ignored me and walked away.

Its target seems to be the Blazing Thunder Wolf, which has been watching closely.

In short, I'm probably safe now...

Thinking this, I simply collapsed on the ground and rested for a while.

Chapter 1 Alive

Hmm...? Ouch... that hurts...

Ah... thank goodness, am I still alive...?

What happened back then was too fast for me to see, damn it. Anyway, the slime and I survived that damn monster.

But where am I now...?

"Hey, are you awake? Box?"

A rather annoyed voice rang out, startling me, and I immediately went into battle mode. But what I saw was a young girl.

"Wow, doesn't she look quite energetic? Nao."

"Layfa! Please be polite."

"Okay, okay, I'll listen to you."

The girl called Lelfa gave Nao a very perfunctory answer, her gaze remaining fixed on me, completely ignoring what Nao had said.

Nao also looked troubled. Wait...? Where am I?

I want to move my hands and feet, but I can't feel them. What's going on?

“Ah, you might have forgotten, about how your arms and legs were cut off.” Relfa tapped my head with her hand.

Eh... I remember now... I remember that bastard Peller chopped off my hands and feet back then...

What exactly happened back then? Since my arms and legs were cut off, I had no power to fight back, right? What exactly happened?

I glanced at my HP bar, and it was full. I was a little surprised.

"Rie, are you alright?" Nao asked as she walked up to me.

It's alright, except my arms and legs are broken. Where's the slime?

It's safe and sound, but it's not here now.

You're gone...?

Tsk, it can clearly talk but won't talk to me, and this guy ran away without saying a word to me. I at least saved it, though.

How did I get here?

According to my memory, I should still be there. How did I end up back here with Nao?

"It was Rielfa who brought you back." Nao looked at Rielfa. "She saved you."

is her?

I glanced at Lelfa; her silver hair was casually draped over her shoulders, with a shimmering light in it, as if there was something within it. She was dressed casually in a predominantly white kimono. Had she saved me?