Warning : Fem!Nagisa, AU (altough almost same with the anime)

Pairing : Karma x Fem!Nagisa

Rating: T

Disclaimer : I DO NOT own asssassination classroom and this fanfiction pure come from the anime and my head.

Thanks to Arisa-Amori27, Blackbird66, DemigodBooks, Fonfon27, Japolo Rei Hellstringer, Ms. Lethe, Whiteberry21, Yamashita Takumi9, amandayingying1, animesmile147, yama-chan82201, Arisa-Amori27, and Capnip for following and favorites this story ^^

This is my first fanfiction and english is not my main language. If there any grammatical error, Forgive me...

"conversation"

'tought'

flashback

"Foreign language"


Chapter 4: Adult's time a.k.a Bitch time

At least that have to be one or two things wrong with this situation, they just can't believe it when their yellow octopus teacher with his full poor disguise come to the classroom with a gorgeous big boobs blonde woman attached to his slithery arm.

Karasuma clear his throath and began introducing her to the class, "Now, allow me to introduce your brand-new temporary foreign-language teacher," he said. "Irina Jelavich, nice to meet you," introduce the blonde woman with lovely-dovey sound while stilll attached at Koro-sensei arms.

'Wait... why is she all over him?' thought the whole class while sweatdrop at the sight and Koro-sensei began to drop his poor disguise while Irina flirting with him.

Karasuma continued with his explanation and said to the whole class that Irina is their new english teacher and will be taking half of Koro-sensei english lesson with her, though the said new teacher seems like to really have a thing for Koro-sensei.

When Koro-sensei turn his head to look at Irina, Nagisa began to take out her small notes and observe him. 'The octopoid Koro-sensei seems flummoxed, having a human woman hanging all over him. His face has so many unique colors, so what color is "bewilderment"?'thought Nagisa and narrowing her eyes while Karma chuckled a little at this.

After a few second, Koro-sensei face began turn pink and glowing at the sight of the blonde boobs, this made the whole class sweatdropped.

"He's just a plain smitten!" said Maehara with a low voice. "There's no mistaking that face," said Nakamura, Nagisa nodding at Nakamura statement, and said, "How Human he is...," with an uncertain voice and then make a notes from this.

Koro-sensei's Weak Point #5: Boobs.

"The more I look at you, the more I like what I see," said Irina still with the lovely-dovey eyes and sound, "Your beady eyes, like two diarrhea pills... your undefined joints... You're positively captivating!" and attached herself at Koro-sensei chest.

'Don't let her trick you, Koro-sensei!' thoght Okano.

'No woman finds those things attractive!' thought Nakamura.

Nagisa stare at both of blonde teacher and the yellow octopus teacher, she began to realise what Irina's real job and what's her true intention come to this class.


"I had all kinds of close-range methods prepared. I Just never thought my seduction would work." Said Irina while look out to the outdoor field from the old school building with Karasuma stand beside her and lighting up her tabacco stick.

While Karasuma just observe her form the side, 'Irina Jelavic. Profession: assassin. Not only beautiful, she has a dozen languages at her command. She can bewitch a target from any nation, and kill even heavily guarded targets from point-blank range with ease. She's an asssassin with a fine handle on infiltration and approach,' thought Karasuma.

"But you can't just hire an assassin to work at a school, we'll have you do some teaching to keep up appearences," said Karasuma while irina began walking to the staff room.

"I'm a pro. My job will be done before I need to resort to teaching," said Irina with a confindent smirk and go to inside.

Hey! Pass! Hey! Kill! Hey! Pass! Hey! Kill!

On the outdoor field at the back of classroom building, the whole Class 3E playing pass and kill soccer with Koro-sensei at lunch break after the students finished their lunch. The games rule is the whole class must participate with their own weapon, passing the ball and attack Koro-sensei after that. But,of course Koro-sensei can dodging all of their attack.

"Koro-sensei," called Irina, make the games stopped and the students looked at Irina while she approaching Koro-sensei. "Karasuma-sensei tells me you're very fast! Is that true?" she said it when she's arrive at in front of Koro-sensei and began to attach herself to Koro-sensei again.

"Well, not that fast...," said Koro-sensei sheepishly.

"Could you do me a favor? I'd love to try real Vietnamese coffe. Won't you bring me some while I'm teaching English?" said Irina with a puppy dogs eyes, Koro-sensei began to turn pink and said, "Of course. I happen to know a great cafe in Vietnam," and gone with his Mach 20.

'Ah.. he's gone,' thought the whole class while sweatdropping and the bell began to rung.

"Er... Irina-sensei? Class is starting. Shouldn't we go back in?" ask Isogai.

After Koro-sensei leave to Vietnam, Irina's attitude began changed to 180 degree, "Class? Oh, right. Just make it a study hall or something," said irina and light up her tabacco stick. The whole class seems shocked at this kind change of attitude except two students.

"And... can you not call me by my first name? I won't be playing teacher unless that octopus is around, so you're going to call me 'Jelavic-onee-sama'" she said.

"So what are you going to do, Bitch-nee-san?" said Karma, while the whole class sweatdropped at Karma words. Vein pop out at Irina's head at, "No nicknames!" yell Irina while point at Karma.

"You're an assassin, right? The entire class working together can't kill this monster, and you're going to kill him all by yourself?" said Karma with a mocking face.

"Brat. Grown-ups have their own grown-up ways of doing things," reply Irina with a smug voice and face, and then she turned around her head to looked at the sky blue haired girl, "You must be Shiota Nagisa."

Karma narrowing his eyes at this, "What do you want to do with her?" he said with a rare serious voice. Bitch-nee-san give him a smug look and said, "Protective, aren't we?" and walked to the bluenette who located behind her.

When she arrive at in front of Nagisa, she cupping the bluenette face and kiss her with a french kiss. This make the whole class shocked while Karma look amused at the sight and a devilish smirk surcfacing at his face, he began to pull out his smartphone from his pocket and opened the camera.

'Sorry, Nagisa-chan. But, a blackmail is always needed eventhough you're my best friend,' thought Karma while taking a picture of the incident.

1 HIT!

5 HIT!

10 HIT!

15 HIT!

20 HIT!

'M-my first kiss!' thought Nagisa, her head began to feel dizzy.

Nagisa begin to push back Irina with her strenght, the action is successfull it made the older woman lips leave her own. After that, she push over the older woman hand form inside, make her relised from the other woman grip, step back a little and make a stance.

Irina look a little shock and began to approach her again when her composure is back. So Nagisa readied her self and jump at a high arc, flip over the air, and landing flawlessly on the ground behind Irina. After that she make a run to Karma and hid behind his back with a bright red face. The whole class jaw dropped at the action and looked at the small bluenette with disbelieve face while the red head smirking at his best friend.

"So you know a matrial arts, huh? But, it doesn't matter," said Irina and turn around to look at Nagisa that hidding behind Karma's back made the bluenette sinking deeper to Karma's back, "Come to the staff room later. I'd like to know what information you have on him." Command her to the small bluenette.

"So~~ the said pro assassin can't search the information herself, huh?" said Karma.

"Yeah! That's right. You said that you're a pro, but why did you need an information from a middle school students," said Nakamura and the others began to protest as well.

"Because it's a pro's job to have technique and connections," said Irina, from behind three man with a supicious looking bag approached her, "You brats go watch from the outfield. Oh, one more thing: interfere even slightly in my assassination, I'll kill you," she said while pull out a golden revolver and then walked away from the students.

When Irina began talking to her partner, Karma look over his shoulder and see the bluenette on his back, "Arara~~ it seems like our little Nagisa-chan have a forbidden love," said Karma while smirking at the bluenette and give her a look at the picture of the indecent kiss. This make Nagisa face went red again and said, "It's not like that!" while trying to get Karma's phone and began to chasing him away.

Her skilled kisses that make you swoon. Her tough-looking companions. The gravity of her threat. Make the class knew at once she was the real deal: a professional killer. But, at the same time, most of the students sense something else: this teacher... they hated her.


At the fifth period, the class do nothing, because the said english teacher busy with her assassination plan for the yellow octopus teacher. 'I've never killed an unidentified creature like this before... eveything's ready. The girl's shared her intel with me,' thought Irina while look at Nagisa and give her a wink, this action make the bluenette spine going up.

Karma snickering at his best friend action and give her a devilish smirk with a horn and tail. The said bluenette sulking and pouting at the red head. 'Ughh... Karma definitely will made fun of me for a full week,'thought Nagisa and crying inside.

"C'mon, Bitch-nee-san. Teach us already," said Maehara.

"Yeah that's right, bitch-nee-san," said Nakamura.

"I mean, you are a teacher here right, bitch-nee-san?" asked Sugaya.

Irina finally snapped at the neverending insult, "Quit your "bitch"ing!" with an angry voice. "For one thing, -Vic and bitch are pronounced differently! You Japanese people don't differentiate between B and V! I'll teach you the right way to say V!"

"First lightly bite your bottom lip. Go on!" command her, and the whole class except a bluenette and redhead begin to bit their bottom lips. "Yeah right. Now stay like that for an hour and give me some piece and quite,"she said.

The whole class pissed of by bitch-nee-san comments, 'What kind of lesson is this?!' thought the whole class except a blunette and a red head.

On the shadowing part between classroom building and a small storage building, Karasuma and Irina had a talk, "I understand you've brought in a rather shady trio. That plan is news to me," said Karasuma.

"Yes, they all pros. All more than competent and tight lipped. Everything's set up, today I'll act," said Irina. A few second later Koro-sensei landing on the outdor field, with Irina's request in his hand, "Irina-sensei, here's the Indian chai you've requested," said Koro-sensei and begin walking to her.

"Oh! Thank you, Koro-sensei! Just what I wanted for my afternoon tea!" with a fake delighted voice while she run up to Koro-sensei and stopped at in front of him, "Actually, Koro-sensei. I'd like to speak with you. Could you come to the shed during fifth period?" asked Irina.

"Speak with me? Of course!" reply Koro-sensei while his skin began turning into pink color.

The students pratice to shooting at a target in the fifth period with Karasuma, and then Mimura saw Irina with a pink Koro-sensei walking together to the old storage building, "You're kidding me, right? They're going into that shed together!" said Mimura and make the other students looked at the same direction.

"Kind of a let-down, watching Koro-sensei fall for such an obivious ploy," said Sugaya.

"Karasuma-sensei," Called Kataoka, this make Karasuma's attention move to her, "I don't think we'll ever warm up to her," she said

"I'm apologies. She's a pro that came here on government orders. Still... completing all her preparations in a single day prove she's an assassin of the highest caliber," reply Karasuma.

"Umm.. sensei, I have a question," said Nagisa, "Is a real bullet can make a damage on Koro-sensei? Because I don't think bitch-nee-san would be using or knew about the anti-sensei BB's bullet, the same for the other three guys, " with this the whole class and Karasuma attenttion move to the bluenette and stayed in silent. 'She's predicted Irina's plans?! Or...,'thought Karasuma while looked at the small bluenette with a shocked face.

'As expected from Nagisa-chan, she's already predicted bitch-nee-san movement with her abnormal observation ability and sharp mind, though the part of sharp mind is rarely come to surface,'thought Karma with an amused smirk.

Meanwhile at the shed, Irina began her assassination attempts. Firstly, she closed the door and began to opening her blazer, walk to Koro-sensei just with her tank-top on top. Secondly, she began to seduce Koro-sensei, and literaly Koro-sensei became more pink a make a lot of sweat from this action. Third, she excusing her self to opening more of her clothes and hide behind a board for one minute.

On the cue, three gun shoot echoing through the shed, hitting on it's mark. 'Live ammo and real guns. Type M61, M134, and M249. All spraying ammo with superlatvie speed and firepowe. These weird pellets won't come into play. After all, there's nothing these bullets can kill,' thought Irina, and she began to count.

Three, two, one, ze-

Walked out from behind the board and the sight that welcome her is Koro-sensei in his full glory without a scratch while the three gunners unconcious on the ground. "Unfortunately, Irina-sensei. Lead bullets have no effect on me, they just melt inside my body," Said Koro-sensei while showed her the melting bullets.

"And take a good look at my face," he said again, and Irina shocked when sees four holes at his face, "You have four eyes?!" asked Irina.

"No, two of those are nostrils," reply Koro sensei.

"Who can tell?!" yelled irina back. Koro-sensei began with his explanation, "There's a metalic odor in the shed that wasn't here until yesterday. An old-man smell whose incongruity opned my nostrils. By pretending to be caught in your trap, I could easily uncover my assassin. In other words...as a pro, you clung too tightly to common-sense assassination,"said Koro-sensei with an evil glint.

"My students attempts are far more flexible and formidable,"said Koro-sensei while walked to Irina's way, this make her step back until she reach the wall of the shed. "And did you know? My retaliation takes the form of care and grooming, you can ask Karma-kun for that," he said with an evil glint and began to worked his tentacles on Irina.

No!

*slither* *slither*

This make the whole E class on the outside shocked, "What was that?!" asked Okano with a worried voice. "Gunshots, a scream... and now a slithery sound!" said Okajima.

No~~!

*slither* *slither*

This make the whole students sweatdropped.

No~~~~

*slither* *slither*

And make them more sweatdropping at the exotic sound. "She's getting slithered but good!" said Okajima with a red face.

"Let's go!" said Maehara and began running to the shed, a few others start following him. While Nagisa and Karma looked at each other, shruging their shoulder and began to following their classmate from behind.

When they arrived, the shed door opened by a pink Koro-sensei. "Koro-sensei," called Nagisa while Koro-sensei walk out from the shed with a poor looking clothes.

"How are those boobs?" asked Okajima with an eager voice.

"I wish I could have enjoyed my self a little longer... but I'm really looking forward to our classes together," said Koro-sensei.

"Wh-what happened in there?" asked Nagisa with uncertain voice and then they see Irina walked out from the shed while wearing an old model PE uniform, her hair tied in a low ponytail with a red headband on her head, and she looked like in a bliss.

"Whoaa! Bitch-nee-san is wearing a wholesome, retro gym outfit!" said Nagisa with a shocked face and voice while Karma chasing out his phone and began to take a photo of Irina in that outfit, "This is perfect for my blackmail materials," said Karma with a devilish smile and Nagisa with the other students sweatdropped at this.

"To think he did all that to me in only one minute... he loosened my stiff shoulders and back, gave me a lymphatic oil massage, got me changed at top speed.. and then to do that slithery thing with his tentacles?" said Irina and fall to the ground.

'What thing?!'thought the whole students and sweatdropping to a whole new level.

Nagisa half turn around her body to give a look at Koro-sensei and said, "What did you do, Koro-sensei?" with a deadpan voice and pointing at Irina on the ground.

Koro-sensei moving his head to other side and changed into white color with a flat emoticon face, "Oh, you know, grown-ups need grown-up care," he said with a flat tone. 'That's the face of a guilty grown-up!' thought Nagisa.

"Now, let's get back to the classroom," said Koro-sensei and began walking to the classroom with the students. 'This is unforgiveable. I've never suffered an unsightly failure! I am a pro, and shall repay him for this disgrace!' thought Irina, while looking at Koro-sensei back with a hateful gaze.


On the next day when english period come, the class filed in silent and they learnt nothing again. Because Irina seems busy with her tablet to make a revenge assassination plan for Koro-sensei. "Dammit! Why doesn't this backwoods school have Wi-Fi?!" yelled Irina.

"You're trying awful hard, bitch-nee-san. You're pride must be in tatters after that," said Karma an easy going voice.

"Sensei," said Isogai,

"What?" reply Irina.

"If you won't teach us anything, could you swap with Koro-sensei? We've got entrance exams this year," continued Isogai, "Ha! You want that vicious creature to teach you? You think you can compare your exams to a planetary crisis? Must be nice being a clueless kid!" reply Irina with a mocking voice and began to stand up from her seat.

"Besides, I understand you E-Class students are the school's loser misfits. There can't be any point to studying now," said Irina while looking down at them, this make the whole class gritting their teeth, except for a certain bluenette and a certain red head, they've heard worst than this.

"I know – how about this? If my attempt succeds, I'll give you five million yen to share! That's far more than you'd gain from any pointless schoolwork! So shut up and do as I-" she said and being cut off by a single eraser being throwed up to her. "Get out," said Mimura with a cold voice, this make Irina attenttion to them and then she flinched at their hateful gaze with bloodlust leaking from them.

The whole room began to chaos, all student except Nagisa and Karma begin to stand up, throwing their stuff to Irina and began yelling at her.

"Get out! You damn bitch!"

"Bring in Koro-sensei!"

"Wh-where'd all this come from?! I'll kill you all!" yelled Irina and Sugaya yelling back at her, "I'd like to see you try!" while Nagisa trying to close her ears with hand and Karma just smirking from his seat.

"Yeah, that's right! Down with big boobs!" yelled Kayano while hanging up a paper with a words on it is 'No More big boobs!' from beside Nagisa.

'That's your complaint?!' thought Nagisa and sweatdropped at her greenette friend. Karasuma who observe the situation from outside make an exparation sigh.

After the whole catastrope, Irina began to protest at the staff room, "What wrong with those brats?! They're sharing space with me a fine woman like me and they're not grateful?!" yelled Irina while banging her hand to the staff desk.

"They're not – hence the classroom is in chaos. Go aplogize to them, if you want to stick around for another attempt, that is," reply Karasuma. With his reply, Irina began to protest and said, "Why should I? I have no teaching experience! Let me focus on assassination!" with a high voice.

Karasuma take a long sigh and began to stand up from his place, "All right, then. Come with me," he said and the walked out from the staff room with Irina following from behind. When arrived at a small clearing, they're hide behind a tree and saw Koro-sensei sit on a white beach chair while working on something, beside him has a desk full of books.

"What is he doing?" asked Irina with a confused voice.

"Writing test question. It's what he does every Wednesday during sixth period," reply Karasuma. "It sure seems to be taking a long time. At Mach 20, shouldn't those tests be written already?" asked Irina again.

"They're different for each student," said Karasuma, this make Irina shocked. "He writes individualized question, taking into account the students best and worst subjects. He has advanced intellegence and speed, this dangerous creature who'll destroy the Earth and his teaching work is close to perfect."

Karasuma began to walked away from the clearing and make a way to the outdoor field behind the classroom building. "Now look at the students," he said while pointing on the students that playing something at the field.

"They're just fooling around," reply Irina when she sees them and Karasuma beginning to explain the students activities to her, "It's training: how accurately strike a moving target with a knife. Assassination badminton, I taught them that," he said.

"Whaat?" asked Irina, she a little confused with the explanation.

"Target and teacher, assassins and students. Here in this bizarre classroom that creature's made for us, everyone has two roles to play. You make a big deal out being a pro, but if you can't be both an assassin and a teacher, then this is the worst place for a pro like you," said Karasuma and began to walking away, "If you want to stay here and keep going after him, don't look down on these students."


The classroom door suddenly opened, but when Irina walked inside the classroom and begin to wrote something on the blackboard the students gone shock. ""You're incredible in bed." Repeat." Said Irina, the students began going back to their own seat when she said that.

"Come on!" said Irina again and they began to repeat her, "Y-you're incredible in bed" with a heavily accented english.

"When I assassinated a certain VIP in America, I first turned on the charm to get close to his bodyguard. Those are the words he said to me. They mean: "You're great in the bed!"" explain Irina and make the students face turning red. 'Just what are you making us junior-high kids say?!' thought Nagisa with a red face and sweatdropping.

"It's often said that the fastest way to learn another language is to get yourself a lover who speaks it. You want to know what they're feeling, so you try your hardest to understand what they say. When necessary in the course of my work, I have used that method to learn more than a few languages. Therefore, my lessons will teach you how to sweet-talk foreigners," said Irina.

She sent a glace to the class and continued her explanation again, "The basics of chummy chats, straight from a pro assassin: master them and they'll come in handy with a real foreigner," while Nakamura and Okajima began to imagining someone.

Irina began to fidgetting at the students stare but still continued with her words, "Let that octopus teach you what you need for your exams. The only thing I can teach you is practical conversation skills and if you still don't think of me as a teacher, I'll give up on my Asssassination and leave. And... I'm sorry about that all the stuff that I said to you," she said.

The whole class seems in shocked at Irina's sorry and after awhile they began to laugh. "Why so nerveous? You were just threatening to kill us!" said Karma.

"She's totally a teacher now," said Maehara.

"We can't call you "Bitch-nee-san" anymore," said Okano. "You.. you understand!" said Irina.

"It was a pretty rude thing to call a teacher."

"Yeah. We need something else."

"How about 'Bitch-sensei'?" and this make Irina frozed, "Er... how about we move away from the whole "bitch" thing?" asked irina.

"Just call me by my first name. I don't mi-" said Irina but being cut off by Maehara, "But that "bitch thing really isn't going away," he said.

Okano nodding her head and said, "Yeah. "Bitch-sensei" fits her way better that "Irina-sensei". Well, there you have it. Welcome, bitch sensei," with a cherry voice.

"Let's get started, Bitch-sensei," said Sugaya, a vein begin to popped out at Irina's head, "I hate you all so much!" yelled Irina or Bitch-sensei.

While Koro-sensei and Karasuma observe the whole thing from outside the classroom, "She's fitting right in," said Koro-sensei.

"More or less," reply Karasuma ang began to took out his gun from behind his blazer.

"Thank you, Karasuma-sensei," said Koro-sensei, this make Karasuma stopped his action half-way, "I want my students to be able to converse with an actual foreigner, and who better than a globe-trotting assassin?" he said and walked away from Karasuma.

'You mean he saw all this coming?'thought Karasuma while staring at Koro-sensei with a piercing gaze from the corner of his eyes, 'He stubbornly refuse to say why he started teaching the E Class. But for as much as he's made it the perfect place for assassination, he's also turning it into the perfect place to learn. This monster's got them all at the tips of his tentacles,' and Karasuma put his gun back to its place.


Omake

"Nagisa-chan, Nagisa-chan~~" Called Karma when he stand beside the bluentte, this make Nagisa looking up to her best friend. "What's wrong, Karma-kun?" asked her.

Suddenly, Karma trapping her in the middle by put his hand on her chair and her desk and began to closing the distance between them. At that time, the whole class staring at them, "What's he gonna do to her?" asked Sugino in hush voice.

"I don't know..." reply Kayano with a worried face.

"Whoaa.. this gonna be a huge scoop!" said Nakamura with a devilish smirk and began to took out her smartphone to take a picture.

Nagisa began to fidgetting at her seat because Karma staring at her while his face just a inch away from her. "W-why are you staring to me like that?!" said Nagisa with a strutering voice. The red head began to moving his face to her right ear, and when he reached it he said, "You're incredible in bed, Nagisa-chan. I made me can't wait for another time," flawlessly and with a husky voice that loud enough to whole class hear.

This make the whole class jaws dropped while Karma moved away his face from Nagisa's and take a look good at the bluenette face. A mischevious smirk began surfacing on his face when he sees Nagisa red as tomato.

'He's definitely teasing her,' thought the whole class.

'Poor Nagisa-chan,' thought a few girl while Nakamura taking a picture on this sight.

"W-whha-" said Nagisa unable to finished her words.

"I'm just practicing, Nagisa-chan~~" said Karma with a mischeavious voice, "Ohhh~~~ are you imagine to do something indecent with me while I'm saying that? Bad Nagisa-chan," and his smirk become more wider and readied himself for a run.

Nagisa began to process what Karma saying and a tickmark begin to pop out at her head, "KARMA-KUN!" Yelled Nagisa and began to chasing him to outside the classroom, the whole class just sweatdropped at the two.


AN: Honestly... I can't say much for this chapter, but to say I'm a little dissapointed with this chapter. It's just.. this chapter doesn't meet my expectation. I'm sorry for made a such crappy chapter :( hope the character not to OOC.

The reason I made Nagisa knows matrials art in this fic:

She need that for protecting herself (because I'm taking a matrial arts too)

Girl's not always stand behind to be protecting by the others

For later chapter

Don't forget to leave a review. Favs and follow too~~

Reviews corner:

To Yamashita Takumi9-san: hahahha mee to XD they're just so cute~~~ Karma really bites Nagisa ear hohohohohoo. Thank you for your support ^^

To Yuzuhara-san: here comee the new chapter ~~

To Amaya Kuruta-san: for their relationship, it's for you to find out hohohoho ;)

Guest 4 : Thank you for your support ^^

To Blackbird66: glad you like it :) And thank you for your support ^^