A Constitute Reality Chapter 1:, an assassination classroom/暗殺教室 fanfic

Soooo, i received a request from Shiranai Atsune to write a fem!Nagisa fic in the cannon line...I'm sorely tempted. Sorely tempted.

So here it is! If there are any warnings I need to mention, I'll put them in the authors note in the beginning XD

It's going to be a little/lot different from the main plot because of two tiny facts;

Namely:

Nagisa is a girl

and

You'll find out the second eventually XD (When, now that I can't say...Whenever I feel like it, muahahahahaha)

DISCLAIMER: I do not own assassination classroom, that belongs to Matsui Yusei, tee hee.

Word count: 5912 (Chapter 1) prologue: 357

(Also, it's been awhile since I've tried my hand at a multi-chapter thing, hopefully this goes well! [Be prepared for very long chapters :P])

Oh, and this is told from Nagisa's point of view normally, or a general point of view. Depends on what would be appropriate for the scene. If you find any errors in my writing, please tell me, as I usually write in past tense but decided to write this in present tense, thank you!

*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧*:・ﾟ✧

Prologue:

The room is completely silent.

Nagisa shudders on her bed, arms wrapped tightly around a fluffy bunny stuff toy. When she had dashed up to her room earlier, she had thrown a blanket over herself for some small comfort. The blanket is touching the bruises on her arms, but in a gentle way that makes them feel a little less painful.

Now she wishes she hadn't; she can't see anything in the room, except the pale yellow colour of her blanket, the sky blue strands of her hair, shielding her face, and the light pink colour of her stuffed toy. Despite the fact that she is covered, she feels a cold draft in the room. Shuddering, she tries to make herself smaller.

BANG!

Nagisa flinches, burying her face into the bunny. It smells like strawberries, and that dumbfounds her enough to forget her fear.

But not for long. The sudden noise in a previously silent room is too sharp a contrast for her to not worry.

It had smelt like a toy, yesterday. What on earth...?

Tap.

The rattling of a window.

Is someone trying to get in? Hesitantly, Nagisa glances around her blanket covered area. She's safe, isn't she?

Is it a monster? Or maybe, an assailant-

Then she realises the pattern of the sounds.

A loud bang, another, softer, bang, a gentle tap, a harder tap, a window latch being shaken, another tap before it loops again.

Nagisa lets out a breath she didn't know she was holding.

She can't say she remembers a monster or an assailant who is close enough to her to know the secret knock she uses with only one other person.

Flinging the blanket off her, she clamberes off her bed, although still clutching the stuffed toy, and heads to her window. As Nagisa lives on the twelfth floor of an apartment complex, most people wouldn't think that someone could get in from the window, but the blue haired girl had chosen a room next to the fire escape ladder as her bedroom. Nagisa slowly walks over to the window, before releasing a sigh of relief and throwing it open.

"Missed me, Nagisa-chan?" Behind the window, a boy her age with golden eyes, a bastard's smirk and crimson red hair, waves cheekily at her, half-on, half-off the ladder.

"Karma!"

Chapter 1:

If you eat tofu in this class, everyone will judge you

Assassination Time!

*:・ﾟ✧*

The doom and gloom of the class seems to hang over them like a large, gray, cloud.

Everyone in the class looks worried, they all have bowed heads and pursed lips. Strangely, they are all wearing protective glasses, as though they are about to commence a very dangerous chemistry experiment.

Welcome to the E Class, or rather, the class of Failures who didn't manage to keep up with their fast-paced junior high school.

Then the door is flung open.

"Good morning everyone!" A slimy voice greets as it's owner enters. "We will be starting homeroom now."

Silence responds to the owner of the voice, who merely smirks, a wide, white as snow, smile against yellow skin.

"Whoever is on duty today, at your call," The owner of the voice says, seemingly to no one in particular.

"S-Stand," in the second row of the class, one column from the window, a petite girl stammers it out. Her hair is a light shade of sky, blue, and pulled up into twintails. Wearing a strange dark blue waistcoat over her uniform, she stands out among the class easily in terms of clothing.

In unison, the class rises to their feet and draws guns, all aimed at the owner of the voice, who is standing at the front of their dilapidated classroom. The owner of the voice looks like a yellow octopus, as they have six tentacles as legs and two as arms, with a giant grin spreading across his face, and tiny eyes like little pills set wide apart. The octopus has no visible nose, and is dressed in strange looking teaching robes, a large, diamond-shaped tie hanging in front, with a brilliant yellow crescent moon sewn on it.

"At Attention," the girl calls.

The sound of twenty-five safety latches being released fills the room.

Swallowing thickly, the girl squeezes her eyes shut, before opening them again and narrowing her eyes in a concentrated manner.

"BOW!"

The room fills with the sounds of bullets flying as everyone opens fire.

But the yellow octopus manages to dodge them all, seeming to flicker between three specific points as he does so.

"Good morning!" The octopus says cheerfully, an attendance book and pen appearing seemingly from nowhere in his hands...er...tentacles... "While you are all firing, I will be taking attendance!"

"Isogai-kun!"

A muffled reply can be heard.

"I'm sorry, I am going to have to ask you to speak up, seeing as we are in the middle of gunfire and all," The octopus shouts.

"H-Here!" A boy in the front row, third column from the door, shouts. His hair is a grey-black, with two strange antenna-like strands on top.

"Okajima-kun."

"Here!" A boy with a butch cut and thick eyebrows calls out. He sits two seats behind Isogai.

"Okano-kun."

"I'm a girl!" The person called Okano yells angrily from her seat to the left of Isogai, the column fourth from the door and third from the windows.

"Kataoka-kun."

"Here!"

Two minutes later, and the whole class is panting, worn out.

Wiping the seat off her brow, Nagisa stares at the octopus in front of her class, their teacher, their sensei.

"Excellent!" Sensei laughed. "Everyone is right on time. That makes sensei very happy!"

Nagisa starts slightly as a dinging sound is heard and Sensei's face turns bright scarlet, a big, crimson 'O' on it as well.

"He's too fast!" A girl with shoulder-length, wavy orange hair the colour of a cantaloupe and grass green eyes sighs from her position near the back of the class, diagonally behind Nagisa, in the third row, third column from the windows. Strangely, unlike the other students, she isn't slumped over the desks and panting heavily, the only sign that she's tired is her uneven breathing and the sweat covering her brow.

"So shooting all at the same times isn't going to work," A blonde girl with narrow blue eyes groans, slumping over her desk in defeat. Her desk is the one in front of the orange-haired girl. "Damn!"

"What a shame!" Sensei chirps. Nagisa frowns, wondering if he's making fun of them as he begun to lecture them on tactics.

He must be mocking them, why else will their target give advice to them, his assassins?

Here's a secret the class is supposed to keep:

They are all killers, assassins.

And have another secret, as a bonus:

Their target is their teacher

"Be more inventive with your plans, or you'll never be able to kill Sensei," Sensei jeers in a matter-of-fact tone. "With my maximum speed of Mach 20."

Nagisa's eyes widen. Sensei hadn't been using his full speed? Feeling slightly crushed, Nagisa gently places her gun on her desk.

"But did you seriously have to dodge all of them?!" The boy sitting in front of Nagisa suddenly regains his energy and leaps to his feet, holding up a small pink circular thing - the bullets that they are using. His blue eyes are hardened with annoyance, and his tawny hair falls perfectly, as always.

Why is it that boys are always blessed with perfect hair, while girls have to actually comb and style theirs? Nagisa wonders, her hand drifting to her sky blue tresses, held in place by rubber bands.

"These are just BB pellets, you know!" the girl to his right shouts, purple eyes screaming annoyance and her brown hair everywhere. There's an example right there, Nagisa almost laughs at the sharp contrast to the girl's messy brown hair and the boy's perfect tawny locks. "You could've kinda taken them on the chin or something!"

As the class, all their lost energy returning, all voice out their agreement, Sensei sighs.

"Alright, load that and pass it to me, Okano-san," Sensei gestures to the gun the hands of the purple-eyed girl. The one with messy brown hair, Nagisa thinks before catching herself.

"I've told you before," Sensei begins. "The bullets may be harmless to humans, but..." Sensei doesn't have hair at all, but if he did, the colour that would suit him is-

STOP THINKING ABOUT PEOPLE'S HAIR NAGISA! She screams mentally, bringing her hands to cover her face in embarrassment.

A gunshot, following by loud squelching noise draws Nagisa from her train of thought. Screams from her classmates ring in her ears as everyone stares in disgust at the wriggling yellow tentacle, looking disturbingly like extremely wriggly tofu, on the floor. Sensei had shot off one of his tentacles?

"These are special anti-sensei bullets designed especially to kill me," Sensei concludes. "And will slice through my cells like tofu. Of course, it will regenerate a few seconds later, but all the same."

Unbidden, an image of her dinner last night rose in her mind. Nagisa had had Chinese take out, with white tofu-

Don't think about that, Nagisa.

"But BB pellets would hurt if it got into your eyes," Sensei moves on to scolding tone, oblivious to Nagisa's inner struggles. "So, no shooting in class unless you're trying to kill me. Good job remembering all your safety goggles today, though!"

"I do hope you will be able to kill me," Sensei's face gains green stripes again. "That is, before graduation."

"Now, put away the ammunition and prepare for class!" Sensei announces.

Nagisa glances down at the disintegrating tentacle once more, as the bell rings.

A mistake. Can you get any dumber, Nagisa? She scolds herself as bile rises in her throat.

"Nagisa!" Nagisa's friend, Kayano, who has green hair and soft, wide, hazel eyes, frantically rushes to the blue-haired girl's side as she promptly vomits her breakfast all over the floor.

"I'm so sorry," Bowing as low as she can manage, Nagisa apologises to Isogai, who had helped her clean up her vomit. It's embarrassing to vomit in class, but even more so when someone else helps you clean it up before you can so much look at it. The two students are in the infirmary, with Kayano rushing about outside, apparently hunting for a bin to throw Nagisa's plastic bag of puke. Since Isogai is one of the class representatives, he had felt obligated to take care of Nagisa, and Kayano was Nagisa's friend, obviously, which was why she's there.

"It's fine," Waving his hand in a dismissive manner, Isogai smiles kindly down at her, as she sinks into the infirmary's only bed...

And here's the time to feel bad about my height, Nagisa mentally sighs as she sags on the dusty, creaking, bed.

"I have two younger siblings at home, so I've had practise with this kinds of things," Isogai continues. "But you shouldn't feel bad, Shio...Nagisa-san, more importantly, are you alright? You vomited very suddenly."

"I'm fine," Nagisa nods. She is, really, just, she thought about the tofu she ate last night and the similarities between the white substance when she shook it with the wriggling yellow tentacle, with it's oozing yellow liquid-

Shaking her head, she chases the thoughts away from her mid. She doesn't need to toss her cookies again. "I'm fine, it was just...a one time thing."

"Are you sure?" Isogai asks. Nagisa nods, wondering if she looked pale or something. "Alright. You might want to rinse your mouth out, then, or maybe if you have a tooth brush...?"

Nagisa's cheeks flush. She forgot that vomiting leaves a bad taste and smell in the person's mouth. Her breath probably smells like sewage now. "I'll go to the toilet, then...Isogai-kun, if you can return to class first, I think I'll take a while, I also need to clean my clothes." Ruefully, Nagisa tugs at her mostly clean shirtfront, her waistcoat having taken the brunt of the puke.

"Alright, I'll tell Kayano-san to return as well," Isogai waves before heading out of the door.

Taking a few, slow, deep, breaths, Nagisa pulls out her phone and dials a number.

"Hello? Yeah, I'm at school," As she listens to the voice on the other end, she sighs in exasperation. "No, no, I don't want to skip. I just need your help with something." Pausing, she suddenly flushes. "No! Not that! Just, could you bring my toothbrush to the classroom? And my other waistcoat - yes, girls are allowed to wear waistcoats, jeez."

After listening to the person on the other end, Nagisa laughs. "Thank you, Karma."

The classroom windows had been opened to let in light, and to try to bring some ventilation into the stuffy classroom.

Isogai enters the classroom, shocking most of the class when they realise that the small blue-haired girl isn't next to him.

"Nagisa-san says she needs to clean up in the bathroom, so she'll probably take a while," Isogai tells Sensei, making everyone relax. Most of the class had thought that Nagisa was fatally ill.

Kayano flounces in shortly after, apologising to Sensei and taking her seat. Unfortunately, Kayano doesn't pay attention to class after that, alternating between staring out of the window, looking at the crescent moon, that has made a surprise appearance in the early afternoon, or practically burning a hole into Nagisa's seat with her gaze, as though she feels that the blue-haired girl would appear if she merely stares at her seat for long enough.

"I will go check on Nagisa-san, then," Sensei says, leaving the room.

Immediately, the class bursts out into chatter, but Kayano doesn't join in.

It is because Kayano is looking out of the window that she sees it.

Or, rather, him.

Kayano has never seen the tall, lean, (Not to neglect to mention, extremely good-looking) redhead before, but then again, this is her first year in Kunagigaoka. Assuming that it isn't anything important, she returns to glaring at Nagisa's empty seat.

Around the class, a few other people also notice the redhead, until a boy with a butch cut and thick eyebrows, suddenly shouts.

"Karma!"

And the class starts buzzing.

A rather long interruption, to describe the Current Events.

Two weeks after the beginning of the schooling year, 70% of the moon exploded.

It came as a surprise to everyone, least of all the E students.

Shortly after, the octopus teacher arrived in class E, greeting them with a sunny smile. "Hello! I'm the guy who tore the chunk out of your moon! I also plan on doing the same to your precious earth next year."

There had been a pause as the whole class registered his words.

That hadn't been all.

"Seeing as I will be your homeroom teacher for your last year on earth, I look forward to getting to know you!"

The class faltered, all clearly thinking the same thing.

There's at least six things wrong with this picture!

Then, out of the two men and one woman who had escorted the octopus inside, all dressed in suits, one stepped forward, gathering everyone's attention.

After which, most of the girls in class also were clearly thinking the same thing as they stared at the well-built, dashing, man in front of them, with spiky black hair and piercing, serious, eyes.

Something along the lines of 'Kyaaa!'

"I'm Karasuma, from the Ministry of Defence," the man said, confusing everyone.

The ministry of defence?

"I..." Karasuma sighed. "Firstly, understand that what I say is classified information." The class exchanged befuddled looks. "Let me be blunt." In unison, everyone drew a breath, watching Karasuma.

"I want you to kill this creature."

Gasps filled the class.

"Umm..." Mimura Koki, boy with extraordinary plain looks, light saffron brown hair cut into a bowl cut and blue eyes, started speaking. "What's the deal? Is he an alien invader or something?"

"HOW RUDE! I'll have you know, I was born and raised on earth!" The octopus shrieked.

"I'm afraid I can't speak about the particulars, but what he said was true," What really?, was written on each and every of their faces as they stared at Karasuma. "And he won't stop at the moon. Next year, he will destroy the earth.

Only the world's leaders know about this. If the news got out, we'll be looking at a global panic. So, we would like you to kill it before that happens."

"In other words: An assassination." As an example, Karasuma suddenly drew out a green knife from his suit jacket, whirling around to stab the octopus, who seem to disappear somewhere to Karasuma's left. There were gasps from around the class as they watched Karasuma spun around, extremely quick, and moved in for the kill again. As he continued in a similar fashion, Karasuma kept missing. "But here's the catch," He informed them in between stabs. "His speed is unmatched! You try to kill him, you get your eyebrows trimmed - immaculately!" To the shock of the class, the octopus produced a manicure set, trimming and combing Karasuma's eyebrows.

"He's a superbeing with enough power to reduce the full moon to a crescent; his speed tops out at Mach 20! In short, if he really wanted to get away from us, we wouldn't be able to do a thing to stop him." Karasuma concluded.

"But where's the fun in that?" The octopus packed away his kit. "So I made a deal with your government."

Setting his tentacle on Karasuma's shoulder, who had a noticeable tick mark on his forehead, the octopus elaborated. "They would refrain on attempts on my life, and in return, I would teach at Kunugigaoka Junior High's class 3E."

After that, Karasuma cleared up on the details of the deal. He can't hurt students, you guys can kill him from close range, we'll be able to keep track of him. His face changes colour according to his emotions (This earned a few salty comments), you all must keep this a secret, these are the weapons we will be giving you, they won't hurt humans but will harm that creature...

And, the cincher.

You'll be paid ten million if you manage to assassinate him.

And that's all that is necessary to know.

When Nagisa turns away from the front door of the old campus, she jumps when Sensei suddenly appears in front of her, outside the old campus, but at the door, bringing a large gust of wind with him. Hyperaware of the yellowish chunks on her waistcoat and skirt front, Nagisa takes a few steps away from the door. (Not to mention, she knows that she had the look on her face, the one people have when they are waiting for someone they really want to see)

"H-Hi, Sensei..." She greets with confusion, her eyes going first to the large dessert bowl he is holding, then to the thin, rocket-shaped thing tucked under his arm.

"Ah, I was on my way to check on you when I decided to pop to Seoul for some of their delicacies," Grinning even wider than before, if that was possible, Sensei holds up a bowl of shaved ice. "Bing Soo," He tells her. Then, following her line of sight, Sensei nods. "A missile. One of Japan's newest, I imagine. The government tried to nuke me as I traveled over the sea."

"Oh..."

As she is walking back from the bathroom, her soiled clothes bunched up in her arms, Nagisa runs into Terasaka.

"Oi, Nagisa, did you note the colours and expressions that octopus makes, like I told you?" Terasaka asks, smirking at her.

Nagisa nods, searching for the small blue notebook she always keeps on her person. So far, she has been making notes on Sensei in it.

"Y-yeah..." Smiling, she begins reading the information out. "All we all know, green stripes are when he's confident. If a student gives a wrong answer, it's dark purple with a cross on it. When a student gets the answer right, he turns bright scarlet. His whole body goes red when he's angry, but what's really interesting is how after lunchtime-" She hasn't eaten lunch yet, actually.

"I've got a plan," Terasaka interrupts. "It's for when he's most careless. THen you'll stab him."

Nagisa falters. "M-Me?"

"Don't act like some goody-goody...we're the E class after all, the End Class!" Terasaka reminds her. "You think we're ever going to get another shot at getting ten billion yen? I sure as hell don't know about you, but I'm slipping out of this hellhole." Dropping a little pouch in her hand, Terasaka turns and starts walking away. "Oh, and if anyone asks, you didn't see me, cause I was in the toilet!"

Nagisa stares at the small pouch, parchment in colour with a scarlet ribbon wrapped around it's neck. It looks so innocent sitting in her palm, like a small party favour.

Closing her fingers around it, Nagisa returns to class

The door slides open for the third time that period, and Nagisa slowly pokes her head in, surprising most of the class.

Actually, fourth time, if one counts the 'toilet break' Terasaka Ryouma, a boy with spiky brown hair shaved at the sides, which are dyed blonde, who has a darker skin tone than most of the class and light coloured eyes. Terasaka sat at the back row, the column nearest to the door, and apparently just walked out of the door because he needed to pee.

That's his story, anyway, the one he had told Nagisa to uphold.

Nagisa slowly enters the class, hoping no one will comment on her lateness, not to mention her now completely clean uniform...

"Nagisa-san!" Sensei calls.

Nagisa almost flinches, then forces herself to relax.

"I'm sorry for being late, Sensei," Nagisa babbles, words spilling from her mouth before she can help it. "But I had to change my clothes and the toilets are really gross and I had to rinse out my mouth, too, but the sink isn't any better-"

"I understand, Nagisa-san. Just go sit down," Sighing in relief, Nagisa practically leaps into her chair. "We are currently writing a poem-"

"Is it a love poem?" Nagisa blurts before she can help it.

Snickers spread around the class, and Nagisa flushes, sinking down into her seat in embarrassment.

"No, Nagisa-san, it is not. Although, you could make it one if you want. It is simply a poem that has to end off with a 'And it was tentacles all along'. I will be reading through your poems to check your grammar and seeing if you have accurately captured the beauty of the tentacle," Sensei nods at Nagisa before slowly turning pink from the top of his head to the tips of his tentacles.

On the board, a poem is written. After skimming it, Nagisa guesses that was an example.

"We have to write it was tentacles? Really?" Isogai sighs.

"Once you're done, feel free to go home!" Sensei adds.

"How we going to write about that?!" Kurahashi Hinano, a girl with wavy, orange hair that is light closer to her scalp and dark near the ends, and green eyes, asks in skepticism. She is the only girl Nagisa has seen who always has perfect hair.

"Well, now," Wriggling his tentacles emphatically, Sensei grins. "Aren't any marvelously slithery phrases coming to mind? Slither slither slither!"

"Enough with the slithering!" Maehara yells.

Nagisa glances down at the tablet he has left on her desk for her. Slowly, picking up a pencil, she begins writing whatever pops into her mind.

"Hey, Nagisa," The boy behind her, Sugino Tomohito, taps her shoulder.

"Hmm?"

"You missed him, but Akabane swung by! He went round the front of the building, so we lost sight of him."

"O-Oh? Karma-k-kun did?"

"I wonder why he came..." Sugino frowns.

"Y-Yeah..."

"He ran down the mountain after that, though. It was pretty funny. I wonder if he saw Sensei?"

"Sensei!" Kayano suddenly calls, attracting everyone's attention.

There's a pause, a short one, but there nevertheless, before Sensei reverts back to yellow and turns his gaze to Kayano.

"Yes, Kayano-san?"

"It feels a little weird only asking you this now," Kayano says haltingly, looking like she was reconsidering her words. "But what's your name?"

"A name?" Murmurs spread throughout the class, most of them only just noticing that Sensei had not given them one when he had arrived.

Nagisa starts when Kayano asks that, her fingers tightening on the red ribbon of a pouch in her hands. As she looks up, she notes how Sensei's gaze passes right through her. He is lucky, she thinks. Although it's probably a little hard when the whole world is gunning for his head, it means that they are acknowledging his strength, doesn't it? Nagisa's begins working the ribbon until it becomes long. No one, after all, Sensei included, can see her, whether as a student or an assassin...he probably has never had to experience being weak, and consequently will have no idea what it felt like when everyone stares through you. Subtly, Nagisa fixes the pouch around her neck, so that it is almost like a necklace. She might be able to kill him, after all, since this teacher can't see her either.

Memories from the year before swarm in her head. Shuddering, Nagisa recalls as everyone erases all traces of her from them, all forgetting her in an instance, as soon as they found out she was heading for the E-for-End class. She remembers her old homeroom teacher, scowling at her and telling her how sick he was of her. And how he was glad that he never had to see her again. Her fingers start shaking as she thinks back to the only person who hasn't abandoned her.

Oh, Karma is going to be so angry at her.

"A name, huh?" Sensei mulls it over, before replying. "I don't really call myself anything in particular...oh! How about all of you come up with a name, if you don't mind. For now, continue with your poems." Sensei slowly turns pink again.

Before she can second-guess herself, Nagisa stands and walks to Sensei.

What's really interesting is after lunchtime, around the time when we become sleepy,

"Oh! Done already, Nagisa-san?" Sensei asks.

There's a point where Sensei's face turns light pink. He becomes slower when answering questions, like just now, when Kayano asked him something.

Behind her, she hears the sharp intakes of breath from her classmates, can practically feel them silently cheering at her. She hears Terasaka snicker. Behind her thin tablet, she has hidden an Anti-Sensei knife. No one has ever tried this before, so they are probably all rooting for her.

This time is probably when Sensei is at his most vulnerable.

"Yeah," Smiling, she counts the steps mentally. Seven steps left. Five. Four. "I tried writing it about love, like you suggested, but I really just wrote anything that c-came to mind...it's a little embarrassing..." Two steps. One. Scratching an itch that suddenly manifests on her cheek, Nagisa holds the tablet out for Sensei, acting ever part an embarrassed schoolgirl who has just written about love.

In this high end school, Kunugigaoka, the third best nation-wide, we in the E class, the prep-school failures think, "We've got to prove them wrong somehow. We'll show our parents, friends and teachers that we can do it if we try."

The second his tentacle makes a move forward, she swings the knife at Sensei.

"Didn't I tell you to be more inventive?" Sensei has a grip on Nagisa's forearm, and plucks her knife out of her hand using a handkerchief.

We have to prove ourselves.

Leaping forward with a tranquil smile on her face, Nagisa knocks Sensei down, her arms wrapped securely around him.

As Sensei's skin colour transitions from light pink to yellow, she sees his eyes widen as he notices the red cord around her neck, and the thing attached to it.

The BB pellet grenade, filled with anti-Sensei bullets.

The sharp sound of a chair scraping back attracts her attention, but only for a second, before everything blows up around her.

BB pellets explode around the room, bouncing off everything.

"We did it!" Loudly, the three boys in the column closest to the door, in the last three rows, cheer. Terasaka and his two friends, Muramatsu Takuya, a boy with blonde hair and brown eyes and Yoshida Taisei, a boy with dreadlocked black hair and dark eyes, all laugh loudly.

The smoke in the room from the force of the grenade hasn't even cleared yet.

"Nagisa!" Clapping her hands to her mouth, Kayano's hazel-gold eyes widen as she fears the worse for her friend.

Most of the students look terrified and worried, save for Hazama Kirara, a girl with messy shoulder length black hair and thick eyelashes that nearly cover her dark eyes, who is watching with a small smirk on her face.

"Ten billion!" The three boys whoop. "Ka-ching!"

"Terasaka!" Isogai yells, turning in his seat to look at the obvious ringleader in this sick scheme.

"What have you done?" Maehara Hiroto finishes for the other boy. He is the tawny-haired boy Nagisa had mentioned earlier on, commenting on his 'perfect hair'.

"Bet he wasn't expecting a suicide bomber!" Terasaka howls sadistically as he looks over his work.

"What did you give Nagisa?!" Kayano shrieks, leaping to her feet in alarm..

"Huh?" Terasaka glances at the petite girl. "A toy grenade." Then, with the world's worse shit-eating smirk, he continues. "But I beefed it up with gunpowder, so that it'd shoot three hundred anti-Sensei bullets at crazy-high speed!"

Kayano gasps.

"It's nothin' strong enough to kill a human, anyway," Terasaka snorts, squatting to better regard his 'suicide bomber'. "My ten billion yen'll cover his med bills, no prob-" He takes in the appearance of Nagisa, the small girl who is curled under a strange membrane. "She's not hurt? Not even a single burn?" Picking at the membrane, Terasaka's brows knit in confusion. "What is this thing anyway? It's attached to that octopuses corpse."

"As it so happens," Comes a familiar voice, only it's coated in anger. "I shed my skin once a month." In front of Terasaka, Nagisa slowly opens her eyes, sitting up. The strange membrane splits around her as she does. "I protected Nagisa-san there by covering her with my old skin."

Nagisa glances up and shudders at the sight of two gleaming red eyes. Sensei is on the ceiling, looking livid. His eyes scream murder, and Nagisa wishes that he would stop talking. "It's my once-month trump card," Sensei growls. "Terasaka. Muramatsu. Yoshida." The three boys flinch. Nagisa doesn't need to look at the colour of Sensei's face to know.

Pitch Black...He's absolutely furious!

Self-consciously, Nagisa wraps her arms around herself. She feels responsible for this. She should have refused Terasaka, but instead, they are here now, with Sensei prepared to chew them out.

"You three...you're responsible for this, aren't you?" Sensei asks, but it's clearly not a question.

"N-No!" Yoshida stammers out.

"It was all Nagisa's idea!" Terasaka is quick to shift the blame. Shuddering, Nagisa wraps her arms tighter around herself, pulling at the cloth of her clothes roughly. All three boys wear expressions of pure terror and Sensei's rage seems to form fog in the room, cutting off the sunlight from the window, the tension is so thick, no one else is speaking.

In the space of a second, Sensei disappears from his perch on the ceiling, leaving behind a giant wind. As everyone registers that he's gone, a sudden new gust of wind signals Sensei's return.

The sound of falling items draws everyone's attention. Three nameplates fall in front of Terasaka, Yoshida and Muramatsu. The nameplates from their houses gleam innocently up at them.

"My agreement with your government prohibits me from harming you," Sensei snarls. "But if you try another assassination like that one..." Sensei, who's holding a large burlap sack,slowly draws out a few more nameplates from his bag. "I just might harm someone else...your family...your friends..." he bares his teeth. "Maybe I'll kill everyone on the planet except you."

Nagisa understands immediately, and, after a quick glance around her class, sees that her classmates have expressions that probably mirror her own. Nowhere on this planet is safe from him. The only escape we have is to...

Kill him.

Doing something that is either one of the stupidest (Ok, maybe not, she is friends with Karma, after all, and he does some pretty stupid stuff) or bravest (Actually, Karma has his brave moments too, so maybe not, too) things she has ever seen, Terasaka actually talks back.

"W-What the hell's wrong with you, anyway?!" He shouts. "You're a pain in the ass! You show up one day, all 'I'm going to blow up the earth!' and 'Kill me!' What's wrong with using an annoying method to kill an annoying guy?"

Suddenly, the heavy fog disappears. The tension practically evaporates and sunlight streams through the classroom windows again, and Sensei's face is scarlet - the face he makes when a student gets an answer correct. "Annoying? Hardly. Your idea itself was a very good one. Especially Nagisa-san, she carried herself in such away that I didn't suspect anything other than the normal assassinations," Sensei lightly pats Nagisa's hair and suddenly, a smaller whoosh of air balloons out. "That gets full marks from me. You did an excellent job on getting past my defenses."

"Sensei, please don't tell me you drew something weird on my tablet..." Nagisa sighs.

"Nyua!" Sensei begins to sweat. To Nagisa, he seems to be surprised that she had noticed him beginning to draw something. In reality, she had long since observed his strange behaviour and now knew when he was going to do something like that. "Um, I mean, However!" Sensei continues with his scolding.

"None of you looked out for Nagisa-san - not even Nagisa-san herself," His face flashes purple. "People like that aren't fit to be assassins. We need an assassination to be proud off! You are all capable assassins who have that power inside of you."

One moment, we're being chewed out at Mach 20, and the next, we're being praised with waving tentacles. Slowly reaching out to smoothen her hair, Nagisa watches their teacher in bafflement. It definitely isn't your usual education...

All the same, it makes her happy. This unusual octopus teacher is actually willing to look them in the eye.

"If you ask Sensei," Sensei continues, lecturing the three boys, who groan and return to their seats.

Then, Sensei turns his attention to Nagisa, who's now standing, still staring at her strange teacher in perplexation. "Let me pose you a question, Nagisa-san."

"I have not the slightest intention of being killed. I will enjoy my time on earth until next march, then I will blow up the world," Nagisa blinks in confusion. Huh? "if you don't like that idea, what are you going to do about it?"

Nagisa thinks over his words. She has never assassinated anyone before, and she was pretty sure the rest of her class hasn't either (Thankfully), and there is plenty of other stuff they can be doing. But all the same, Nagisa feels some bloodlust in her. She thinks that this teacher might even be alright with them trying to kill him.

"Before you blow up the world," Nagisa smiles, her hands tightening into fists. "I'll kill you."

Green stripes flash across Sensei's face. "Then what are you waiting for?" The corner of his smile curls up into a smirk. "Once you've killed me, feel free to go home!" Sensei announces, switching back into yellow.

The class erupted into protests and Nagisa returns to her seat as they shout at Sensei.

In front of them, Sensei starts polishing the plates. Nagisa sees Maehara and Isogai both holding guns, watching sensei with guarded expression. The two of them are strangely always in sync, she suddenly notices.

"An unkillable teacher..." Kayano voices her thoughts, surprising Nagisa.

"Huh?"

"Korosenai (殺せない) for unkillable, sensei (先生) for teacher..." Kayano suddenly turns to nagisa. "Oh! What about Korosensei (殺先生)?"

"Korosensei?" Nagisa knits her brows.

"Nyua?" Sensei jerks up at the sound of the name.

Nagisa smiles at Kayano before turning to their teacher.

So there they are, in their assassination classroom with Korosensei, where the bell has just rung...

FOR SOME REASON MY BRAIN WAS ON HYPER ALERT AT THE FRONT BIT (That's why it's so different from cannon) then died at the end (That's why it's practically word for word copied...)

Well, it turned out longer than I expected, sorry :(

Anyway, obviously, that's what I mean by differences.

Please review your thoughts or complaints!

Oh, and:

[Bonus] {See if you can guess what their relationship is XD}

When Karma went to Class E in this chapter (To give Nagisa her stuff)

(Written in past tense so I don't die)

Nagisa stood nervously at the front door of the old campus building. Karma had better hurry. She had missed lunch (She had been in the infirmary) and now was her second favorite class, Japanese. If Karma made her miss it, she would-

Ah, there he was. Relaxing slightly, Nagisa tapped her foot impatiently. Karma was wearing, for some reason, a dark blue cardigan and cyan undershirt that contrasted sharply with his crimson hair, and a pair of pale parchment-coloured jeans.

"Jeez, Karma!" Nagisa pouted, mock-glaring at the redhead as he presented with a bundle of clothing.

"What? You woke me up, so I took my time hiking up the mountain," Karma shrugged as Nagisa accepted the clothes.

Nagisa blinked. She woke him up? Over the phone, he had told her that he had been 'Awake for hours' and that she 'Didn't need to worry, [he'll] get her clothes and stuff.' "You told me you were awake!" Nagisa said, her tone accusatory, feeling guilty. Reaching out, she took his hand, pushing his sleeve up to his elbow. The two had hung out the day before, and Karma, in his typical way, had gotten into a fight and actually gotten hurt (Though, that may have been on purpose, so that Nagisa would worry about him, he had seemed rather amused when she began panicking over his bruised arms) and she had confined him to his bed.

"I lied," Karma shrugged. "Didn't want you to feel guilty, like you are now. By the way, your classmates were ogling me from the windows."

Nagisa froze. She had forgotten about them. "Oh..."

"Relax, jeez," Karma grinned. "Are you going to kiss my bruises?"

Nagisa hesitated before frowning at him. "Only the one on your wrist." Bringing Karma's wrist to her lips, she pressed a small kiss there, making an exaggerated 'Mwah' sound.

"I couldn't see your teacher, though. Was it the Yukimura-sensei you're so fond of?"

Nagisa's face fell. No one knew what had happened to their previous teacher. She had just suddenly stopped coming one day and three days later, Sensei had appeared.

"Touchy subject?"

"They're your classmates too, you know," Nagisa changed the subject, smiling at Karma affectionately.

"Blegh. No thanks."

Nagisa frowned. "Karma!"

"Yeah, yeah. Now give me what you promised me," Leaning down so he was in eye level with Nagisa, Karma smirked. "Come on..."

"Karma."

"What?"

"You just insulted our classmates. I'm rather fond of them, you know," Nagisa pouted. Poking her finger into his chest, Nagisa gently pushed him away. "So I'll give it to you later."

"What?!" Karma's eyes widened. "That's not what you promised me!" He whined.

"Too bad," Nagisa leaned forward, kissing Karma on both cheeks. "Feel better now?"

"Yes. But you have better give me that game."

"Go run home," Nagisa gestured at her front. "As you can see, I need to clean up."

"Can I watch?"

Nagisa gave Karma an unimpressed look.

"Got it, got it," Holding up both his arms in an 'I surrender' manner. "I'll even run down the mountain as punishment."

To her surprise, he did just that.