Ansatsu Kyoushitsu: To Tame a Demon

D/C: I don't own anything from Ansatsu Kyoushitsu, I only own my own OC's.

**Ansatsu Kyoushitsu**The arc of Hunters**

The arc of Hunters begins

Chapter 1

Nagisa's pov:

Our world is pretty strange. And so are the people in it. No offense to anyone, but seriously. Even I am strange - actually these strange people around me, think that I am even weirder than they are. Why?

Because I'm in the E-class, the end class.

Let me explain the laws of our world, so you can understand why the E-class is the worst. Or at least in the Kunugigaoka junior-high.

There are three worlds, Hell, Middle World and Heaven. Or that's what they say, but no one really knows is there an actual Heaven. We do know, that there is a Hell, there's no doubt about that.

Hell is the world of monsters, the world that lies under Middle World. There are lot of monsters, so many that we can't name them all, because there are always new ones coming out of nowhere. So, usually we call them just monsters, which is not weird at all. But then there are the ones that rule those monsters. And they are Demons. There are many kind of demons, but the most known ones are Earth Demons, who control the element earth, Water Demons, who control water and Air Demons, who control the air. Of course, there are Ice Demons, Mist Demons… seriously, too many for me to name. And unlike monsters, you don't see demons every day, and they can't be defeated so easily. That is why we have Demon Hunters. But before I explain who they are, I want to give a warning.

The strongest demons are Fire Demons, and the Devil, who rules the Hell as it absolute king, is a one. You might also know him as Satan. But Fire Demons are very rare, there aren't many people who have see them. The Devil never leaves Hell, nor does he have many children. There are about ten Fire Demons alive, not necessary even that much. But they are strong - really strong. There has only been a one person in the whole Middle World who has survived a Fire Demon's attack. And it did cost a lot to him. If you come across a Fire Demon, you're dead.

There are only about thousand demons, which isn't much, but there are at least ten billion monsters. It doesn't really matter how many you kill, new ones are always born. And we in Middle World are really lucky that they are quite weak, you don't need to be a Demon Hunter to kill a one. But demons are different - they posses people, use them and drink the life out of them. There are also many weak demons. How do you know is the demon weak or not? Explanation: only the strongest demons are capable of taking a human form. Only the strongest demons can posses people.

To but it shortly: Hell is the worst place in the whole universe. Monsters, demons, Satan. Get it?

Good. Now, let me explain Middle World.

Middle World, as the name says, is in the middle of everything. It's my world - or rather, the world of humans. I don't know, can I call myself a human anymore, since we use magic and magical weapons in order to defeat demons. Well, not every human does that. But Middle World is always in danger, because monsters try to take over it everyday. It's a never ending fight and it has been like this for centuries. But things have been worse, in the middle age, humans almost disappeared. We have to thank the first Demon Hunter, who killed the first Devil and made them weaker and almost destroyed every Fire Demon there was. But ever since, monsters have wanted revenge for their dead leader, even though they have a new one. But Satan was the son of the first Devil, and he controls everything in Hell. Everyone follows him. But enough of Satan, let's concentrate in Middle World now.

The human world is a great place, and technology has taken over almost everything. We have even created robots to kill monsters, because there aren't many cops to kill them anymore. Middle World isn't all that peaceful, but I've already explained why. The way our society teaches the children is very simple.

Humans are good, monsters are bad. Kill them. Always remember this.

But not every human becomes a cop or a Demon Hunter. Because both of these works are very dangerous. Sure, cops protect the order and the law around the world, but they also have to deal with monsters daily. Even if monsters aren't really strong, you still have to put your life in the line, always. Save the citizens, even if it kills you. Not many people have the courage to do that.

Then we get to the heroes, Demon Hunters. Oh, how I admire them. They are the only peoples in the world, who have the power to go against demons. Demon Hunters are the best, the strongest. They fear nothing, and they protect everyone without any hesitation. There aren't many of them either, only about five hundred. Which may sound a lot, but it really isn't. And despite the fact that they are strong and not scared, they aren't always as strong as demons. Hunters die, every week at least two or three. Of course, new ones graduate every week at least five, but they are newbie's. Not very strong and inexperienced. I can't blame them, I'm not any better. To become a Hunter, you must go through a lot of training. If you want to become a one, you must be very determined and very wise. You must have a strong soul, in the case a demon would try to posses you.

The training starts when you are nine, that is, if you have decided to become a one. No one will make you do anything against your own will - it's your own decision. You can back away anytime you want. And many people do. But those who don't, they start learning magic and fighting-skills. When you've gone through two of just learning things out, like spells and everything humans know about demons. After learning that, the real training starts. And it's mostly combat-training. It's actually pretty simple, but only when you're not the person training.

Learn things, learn more things, fight, learn, fight, learn, fight and once you're fourteen or fifteen, summon a demon and make your first contract.

Yes, even oh the so strong Demon Hunters I truly admire, need help. Magic isn't strong enough to always kill a demon, nor are the weapons. You need help from an another demon, that has to be strong. But you have to be stronger.

A demon does not obey a master, who is weaker than the demon itself.

That is the most important thing a Hunter will ever learn.

To form a contract and to tame a demon, you need to be strong. Always. Be. Strong. Sounds simple, but it isn't. When you summon a demon for the first time, it isn't strong, because usually neither are you. Demons you summon for the first time can never take the form of a human, nor can they posses you. But of course, they can hurt you, or make you crazy by just talking to you. It seems, that they only live to make peoples lives miserable. They only live to kill.

Usually, once you've summoned your first demon, made a contract with it and tamed it, you kill it or break up with it. It usually never last more than two or three years. But after that, Hunters start to form more contracts and tame more demons, until they are strong enough to summon demons who can posses human-bodies and make contracts with them. Even tame them. But never befriend a one. It's against the laws of Middle World to actually become friends with demons, no matter how long you've known it. And I think that is kinda sad.

So, simply to put it: Middle World is the world of humans, the best place in the world. Demon Hunters and cops protect us. They fight so ordinary humans can survive.

Once you've gone through hunter-college, you'll graduate as a real Demon Hunter. You'll be part of the Hunter society and you can form a team and defeat demons. Travel the world, outside of the Japan.

Then, there's Heaven. It's above everything, the paradise. No monsters can reach it, but only the chosen ones can go. I mean, only the chosen humans. But no one ever gets chosen, and that's why I personally don't believe into Heaven. No teen in these days believe. And so, I don't have much to tell about Heaven.

Now, to introduce myself.

I am a teenage boy, in Kunugigaoka junior-high. Or more commonly the Japan's best hunter-high. Yes, I am training to become a Demon Hunter, and it's great. I'm fourteen and this really is a dream come true.

If I only wouldn't be in E-class. The 3E-class, end class, the class of outcasts. The worst thing in the world. Kunugigaoka junior-high and high-school are on the top of Japan's schools, even the third ones in the world - but even this amazing school has it losers. The worst students in Kunugigaoka junior-high are sent to E-class, away from the huge main building, so the stupidy wont pass on to the wiser students. We have a school-building in the middle of a forest, really far away from the main building. The main building students hate us. And we hate them.

In reality, E-class isn't all that bad. At least we care for each other, we look out for each other. We stick together. And we have the greatest teachers ever! Our homeroom-teacher is named Koro-sensei, and he's little… different. Remember when I mentioned that only one person has survived after meeting a Fire Demon - yeah, well, that person is Koro-sensei. And like I told already, it had a cost. Our teacher lost his humanity.

Now days, he is a yellow octopus, for unkown reasons. He act like a normal human, or a normal Hunter. He turning into a yellow octopus didn't bother him all that much - or that's what he says - since he is now a super-fast, really strong and scary yellow octopus. It's bit weird, that a Hunter as strong and successful as Koro-sensei, teaches the lamest class in Japan. But like I said, we have the best teachers. Koro-sensei is kind yet little mischievous, and he almost always knows what to say. He makes school seem fun! I've been E-class now for about a one and half year, and I could actually make it back to the main building - but why would I, since the E-class is so much more fun. We do things little differently and Koro-sensei always makes sure that everyone is having fun and no one gets left behind. The E-class is like a whole another world than the main building.

Our two other teachers are Karasuma-sensei and Irina aka Bitch-sensei. They are both nice, but Bitch-sensei - like the name says - can really be a bitch sometimes. We still care about her, because she is part of our family. Karasuma-sensei is our PE-teacher, and he is always very serious and calm. Bitch-sensei is our language teacher, and she is loud, bitchy yet charming. They are both pros, even though they are quite young, especially Bitch-sensei. But Koro-sensei outmatches both of them, and everyone in the class.

Alright, I think I've explained some basics, and you'll find out the rest of it sooner or later. My name is Nagisa Shiota, and I am a student in Kunugigaoka "hunter" junior-high, 3E-class.

**Ansatsu Kyoushitsu**The arc of Hunters**

"Okay, class", Koro-sensei said, grinning like he usually did. "Today I'll teach you the basics about summoning a demon. You know it's Monday, and in Wednesday, every one of you will try to summon your first demon. Isn't it exciting?"

"But sensei", Maehara-kun, a blonde boy, whined to the yellow octopus. "We have already learned the basics. Why do we need to go through this again?"

Koro-sensei had green stripes on his face and he chuckled slightly. One of the weirdest things in sensei was that he could actually change his skin color. None of the students really knew how he had turned into an octopus, and the other teachers didn't tell us about it. And neither did Koro-sensei - all he had said was that he had been attacked by a Fire Demon. "That is correct, Maehara-kun", the yellow octopus said. He raised one of his tentacles and patted the blonde boy on the head. "But, now I'll summon a demon. Then you'll truly see how it's done. C'mon, let's go outside."

We all stood up and followed sensei to the backyard, where he told us to draw a magic-circle needed in demon-summoning. "Okuda-san, please tell me why we need this magic-circle", Koro-sensei said to a small girl, who had two braids and glasses.

"The circle will help you to keep the demon under control", Okuda-san answered, her voice little shaky. We all knew that she was little anti-social, and many of us wondered why a girl so shaky wanted to become a Hunter. But I wasn't all that different from her, really.

I wasn't all that strong, and I was pretty shaky too. I used to get bullied in the main building, and that started to affect my studies - and then I ended up in E-class. But at least I have Koro-sensei and the class now. They are the same with me, not too strong nor too wise. Average, as the principal would put it. And average wasn't enough. But thanks to Koro-sensei, our class had gotten better. The yellow octopus had started teaching us when our third and final school-year started, and even though it had been only a month, everyone loved him. He really was something else, I had to admit it. I looked up to him more than anything, and I really wished that I could become a Hunter as strong and as wise as he is.

"Exactly!" Koro-sensei nodded, smiling approvingly. "The demon cannot step out of that circle, unless I give it a permission. But first, you of course have to make a contract with it." Koro-sensei then told us to step back, as he took a step forward. Karasuma-sensei and Bitch-sensei were both watching closely, prepared to help if something would go wrong. "Now, students, I wont summon a very strong demon, because I don't want to risk your lives. You know, that even if the Hunter is as strong and experienced as I am, things wont always go so well. If you decide to summon a stronger demon, a stronger magic-circle is needed. And a very strong will."

"Yes, sensei", we all said in unison. Koro-sensei let out a chuckle before he started to summon the demon. We listened quietly as our teacher mumbled the spell needed to summon a weak demon, and when he was halfway through, the circle started to glow dim blue light. That told us that he was summoning a Water Demon, and soon, there was a fish like creature in the circle. Koro-sensei quieted down and turned to look at us.

"Now, Nagisa-kun, how do you know is this a weak or a strong demon?" the teacher asked from me.

"The circle is able to hold the demon completely", I answered. "And it doesn't seem to be able to take a human form nor does it try to posses you. It could fake it, but you didn't use the spell to summon a strong demon and it's not usually even possible to summon a one - so it's very unlike that this ones faking anything."

Koro-sensei nodded, a red circle on his face. "Good job, Nagisa-kun. Now, I'll form a contract with it. Watch and learn, students. In two days, you'll be trying this same thing."

It was a cool lesson, was all I could say. And as I walked back to home, I couldn't help but be excited. I had waited for this so long! Being able to summon my very first demon and make a contract with had been my dream and wish for so long. I've always been fascinated by demons, and I wish to change the world. It's a big and pathetic dream - but I really want to prove people, that demons aren't so bad. They had a heart and feelings, just like we humans do. Why did I believe into this?

Because I was once saved by a demon.

No matter how cliché it may sound, I still remember that day like yesterday…

Five years ago:

The park was quiet and I was all alone there. When I had come, three hours ago, there had still been kids and I had fun. My mom and dad had been working, and I had been alone in home, so I had decided to go to the park - without my parents permission, which was stupid. But I was nine already, I believed that I was big enough to go alone. And the park wasn't all that far away from our home.

But now that the clock was already eight pm, and my parents were probably already home, I couldn't decided should I leave or not. I still wanted to play, but since there was no one to play with…

"I'll play with you", said a new voice. And then I turned around to look behind me. I was sitting on a rock, at the darkest side of the park. Behind me was standing a young boy at my age. He was wearing a long black coat and a hood, that covered his face. But I could still catch the red strands of his hair. I was pretty fascinated by his crimson hair and it took a minute for me to comprehend what he had just said.

"…Y- you'll play with me?" I asked from the boy. He let out a chuckle, and it sounded like sweet honey to me. There was something wrong with the boy, who was surrounded by darkness. But instead of being afraid, I was only curious. Curious to know more about this dark boy, with crimson hair.

"Yes, I'll play with you", he said again. "Isn't that what you want? A friend to play with." He took few steps closer, and I could swear, that the sky got darker. "Hmmn? You seem lonely, what's wrong?" He sat next to me, the hood still covering most of his face. But now I could see part of his pale and perfect face. His lips were curled up in to a small gentle smile.

"You know, you have a pretty smile", I bluntly said. The boy seemed to stare at me for a moment, before he started to laugh like I would've said something stupid. "Wha- what?" I didn't get it. What was so funny?

"It's kinda weird", the boy answered, once he was done laughing. "For a human to say such things to me."

"For a human…?"

Just then, I realized that the boy in front of me was a monster. The realization made me jump away from the rock, and I fell to the ground, my body shaking a bit. I should have realized - the dark atmosphere, the fact that the boy hid his face, honey sweet voice… It all told me that the boy wasn't human. He probably had horns hidden within his hood or something.

"Now you realize?" the monster-boy chuckled. "It took a while from you. And here I thought that you were already nine."

"How do you know my age?" I asked.

"It's too hard to explain for a kid like you", the boy said. He stood up and took a step forward me. I was frozen in fear and I couldn't get up or run away. Mother had always warned me about monsters and going out alone - especially when it was already night-time. The sun was setting and I guessed that it was going to rain.

I looked up to the boy in front of me, my body shaking like a lonely leaf in the wind. I was waiting for him to kill and eat me, because that's what monster do. But then the boy gave his hand to me.

"C'mon, get up. The ground is dirty and cold, your mother wont be happy with you", he said. "It's getting late too. Go home, kiddo. I'll play with you some other day."

My fear was gone as fast as it had come. It was again replaced with curiosity. Why would a monster help me? I had been told that they were creatures without a soul and heart. Why would a one help me? To find an answer, I took the hand and let the boy lift me up. His hand was strangely warm, so warm that I didn't want to let go. Just then I also realized that he was radiating not only darkness, but warmness as well. Like a hearth.

"What's your name, kiddo?" he asked from me, once I had gotten up.

"Nagisa. Nagisa Shiota", I answered. "And yours?"

The boy let go of my hand and took few steps back, bitter chuckles escaping his lips. "You don't need to know my name. It wont do any good to you - once you become a Hunter, then you can learn a demon's name."

"So you're not only a monster, but a demon too?"

"I'm only a demon", he responded. "But of course you humans think that I'm also a monster."

"If you're a monster, then why did you help me? And why wont you devour my soul?"

"How many questions do you have, human boy?" the demon chuckled. But he got very serious quickly. "I can't answer every question. And I didn't really help you either - but why wont I eat you or even kill you? Honestly, you seem little different from the other humans. You don't seem so… stuck up."

"What?"

The demon sighed. "Forget it, kiddo. Go home already."

"Why do you call me a kiddo, when you're the same as I am?" I asked.

"Seriously? Are you seriously asking me that?" the demon said, sounding pretty surprised. "I'm a demon, a strong one. I can take any form I want to. You don't even know am I young or old - I could be five or I could be fifty. It wouldn't matter either way, demons don't grow up like humans. It takes about a year until we're practically at the same age as grown-up humans."

"So, you're really old?"

"I'm not old! Or not for a demon, anyway", he retorted, now sounding little irritated. "And like I said already, go home. Your parents must be worried about you."

"Ah, yeah, you're right", I said, nervously chuckling. I turned around and started to walk towards the road that led away from the park. But before I went, I turned around just one more time. The demon-boy was still standing there, now about two hundred meters away from me, head turned at my direction. It was still hard to tell where he was looking, since I couldn't see his eyes. "Then, will we meet again?" I yelled at him. "You said you'd play with me some other time, didn't you? So, how about we meet here tomorrow? I still have so many questions."

I heard how the demon chuckled quietly. "Not giving up, are you, Nagisa-kun. We'll see about that. Go now." I smiled at him and his "irritated voice" and turned around once again. I was just about to step on the road, when the ground under me started to move. I looked down in horror, but it was already too late. Whatever I had stepped on, send me flying away. Everything from then on was just one big blur to me, but I do remember the stars, hitting something hard and the demon-boy's voice calling out for me. After that I remember warmness and light. It didn't last long, but for a second, it was really warm and nice, I even forgot the pain at the back of my head.

"Nagisa-kun?" a honey sweet voice called out and I opened my eyes slowly. It was still quite warm around me and I could feel a hand on my forehead. There was a red haired boy kneeling next to me, a worried look in his eyes… yeah, I could finally see the eyes under the hood.

They were pure gold, so breathtaking. I could see at least ten different shades of cold, from darker to lighter. His eyes were sharp and deep, and they were looking directly at me. The attention was pointed directly at me. I could see fire in those damn beautiful golden eyes, that glimmered like two stars in the night. Like the sun. Like fire. Slowly, I also realized that I wasn't making any sense.

"Nagisa-kun… You'll be fine", he said, a sweet and apologetic smile on his lips. "I'm sorry about this."

"Wha- what are y- you talking about…?" My voice sounded awfully weak and that made the golden eyed boy grimace. Then I heard an another voice.

"It's a kid! Save him!"

The golden eyes turned away from me for a second, but were back very quickly. He was still smiling.

"You know, for a human, you really are pretty strange", the demon-boy muttered quietly. "I'm sorry, I wont be able to play with you. Ever. Now, I have to go, Nagisa-kun. Goodbye."

"Wa- wait…"

But he was already gone.

Back to the present:

I never went to that park after that day. I would've wanted, but my mother didn't allow it anymore. Only a day after, I learned that I had been attacked by a monster, and then someone saved me. No one knew who, except me. I knew that it had been the demon-boy, with crimson red hair and golden eyes. The boy with a pretty smile, like I said myself.

Of course, I didn't see him anymore after that. But because of him, I learned that not all demons were completely bad. I knew that the crimson haired boy had a heart and a soul. And that was the reason I decided to become a Demon Hunter and my training started three months after that evening. Even though, Hunters kill demons, I wanted to become a one to tame them and possibly - break the law - befriend them. I wanted to show everyone, that demons had a soul too.

My mom thinks I'm crazy and so does everyone else I've told this. Except Koro-sensei and my father. Koro-sensei says that he has seen the same thing as I did - an act of kindness from a demon. The octopus also told me, that it was the biggest reason he decided to become a teacher. So he wouldn't need to kill meaninglessly anymore. Koro-sensei thinks that you shouldn't judge all demons just because they were born as demons and not humans. What I believe, is that the golden eyed boy was a human born as a demon. I know he wasn't bad - and I still wonder is he alive and well. It's hard to forget a person with so mesmerizing eyes. When I'll be able to summon a demon as strong as he was (I know he's strong, since he was able to take a humans form), I'll definitely summon him. But of course, I need to find out who exactly he is and what kind of demon.

But at first, I need to learn how to tame a weaker demon. After that, I'll meet the golden eyed demon again and definitely tame him.

**Ansatsu Kyoushitsu**The arc of Hunters**

Third person pov:

There was a young boy sitting on the roof of a high-school building, hanging his legs over the edge, the crimson hair dancing in the wind. He seemed to be at least fifteen years old, and he had a strong and muscular, yet very slim looking body. His hair was almost as red as fire, but just little bit darker. The teenage boy had very pale, perfect smooth skin and a small smile on his face. He was wearing a long dark-grey coat and had a hood covering half of his face, shading it darkly. He was also wearing black jeans and a blood-red shirt under the open coat. Right next to the boy was lying a sheathed katana, the boy's hand holding onto it tightly. It was like he would've been afraid that someone would take it away from him.

"Young master", said a new voice, and suddenly there was a man standing three meters behind the boy. "It's not safe here, we should get back. Once you're father realizes that you're missing, he'll go mad."

The boy slowly turned his head away from the view, to the man behind him. The other man was radiating only darkness and coldness - unlike the boy who seemed to be only glowing dim red light and warmness. The teenage boy said nothing as he got up, the sword in his hand. Suddenly it disappeared into thin air, but it didn't seem to haze the crimson haired boy the least.

"Young master?" the man asked, little surprised by the sudden actions. "Your katana…"

"Don't worry about little things like that", the boy said with a light and cheerful voice, even though there was a slight threat in it. You could see a mischievous smile on his perfect light pink lips. He walked towards the dark man, until he stopped right in front of the man. "And father has already noticed my absence, and he must really be angry. And you know what too?"

"Yes, my young master?"

"I have no intentions of going back to Hell. Not just yet", the boy said. "This world is so much more interesting. So, why wont you go and tell that to my old man?"

"Young master… If I say something like that to your father, I'll lose my head", the dark man said nervously.

"Either you do it, or you'll lose your head now", the boy said to that, still smiling. "Beg. He'll let you live."

"Young master, are you sure?"

"I am. Now go." And with that, the dark man was gone and the crimson haired boy alone in the rooftop. The wind got little stronger and suddenly it blew the hood off of the boy's head, revealing rest of his face.

The boy's smile grew wider, so now it revealed the sharp teeth he had and a silent chuckle could be heard through the rooftop. The boy had deep and sharp golden eyes, that glimmered in the night, looking down at the ground, like he would've been looking for someone to hunt. There was a glint of amusement in the mischievous eyes, and behind all it, there was burning fire. Fire that couldn't be extinguished.

"Now then", the boy said, a smile in his voice as well. "This should be interesting."

End of chapter 1

**Ansatsu Kyoushitsu**The arc of Hunters**