Karma finally understand that Koro Sensei is different from all teachers from the main campus. He cared about his students and always teach them all the way that normal teachers couldn't. At the streets, Tsurugi is running toward the school. He already know how to drive vehicles but he don't bring any of them due Karasuma told him not to. While running, he look at his wristwatch.

Tsurugi: I can't believe I'm overslept! It's not that I need to study much, just don't want to be late to school!

As he continue running, he turn to the side right and saw Koro Sensei deal with three thugs and saved a woman. It shows that the woman is clearly from a foreign country because she has long blonde hair, blue eyes and wearing white button shirt and short tight skirt.

Tsurugi: What is Koro Sensei doing there? And why is that woman... looks kinda familiar? *snapped* Ahh! Crap! I'm going to be late!

(Time Skip)

At the Old Campus...

Tsurugi sits on his table while panting. They asked him why he looked tired and he tell them that he run all the way here. Then Karasuma and Koro Sensei along with the woman from before enter the class. She still clinging on Koro Sensei.

Karasuma: Now, allow me to introduce your brand-new temporary foreign-language teacher.

Irina: Irina Jevalic. Nice to meet you all!

Hiroto(In mind): What a knock-out!

Taiga(In mind): What knockers!

Rinka(In mind): Wait... Why's she all over him?

Rio(In mind): Pisses me off...

Irina: Who'd have thought you were a teacher here? You have a nice hair.

Koro Sensei: *take off his wig & fake nose* That's a wig.

Irina: Oh, I don't mind!

Tsurugi(In mind): Irina Jevalic... where did I've heard that name before?

Karasuma: *glance at Koro Sensei* This school intends you to authentic experience in foreign languages. I trust there are no complaints about her taking over half your English lessons?

Koro Sensei: If we must've...

The class still kinda confuse but they still impressed that they got a teacher from foreign country.

Kaede: We've got us heck of teacher! Not only that, she seems really have a thing with Koro Sensei.

Nagisa: *nod* Uh-huh. I might get some assassination hints out of this. 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"?

Koro Sensei's face turn bright pink when he look at Irina's chest while the girls felt annoyed.

Hiroto(In mind): *sweatdrop* She's just plain smitten!

Hinata(In mind): *sweatdrop* There's no mistaking that face.

Nagisa(In mind): *sweatdrop* How human of him.

"Koro Sensei's weak point #6: Boobs."

Irina: The more I look at you, the more I like what I see! You beady eyes, like two diarrhea pills... Your undefined joints... *hugging Koro Sensei* Why, you're positively captivating!

Koro Sensei: How embarrassing!

Hinata(In mind): Don't let her trick you, Koro Sensei!

Rio(In mind): No woman finds that things attractive!

Nagisa(In mind): We're not that dense. Any teacher coming to this class at this time has a fairly high probability of being not an ordinary teacher.

Then the class doing some assassination during the break. At the field, they kicking the soccer ball at Koro Sensei while trying to hit him with the guns and knives. Irina and Karasuma look from the window in the building.

Irina: I had all kinds of close-range methods prepared... I just never thought that my seduction tactics would work.

S

he take out a cigaratte and put it at her mouth as she lit it.

Karasuma(In mind): Irina Jelavic. Profession: assassin. Not only is she beautiful, she had 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 assassin with a fine handle on inflitration and approach.

They keep looking outside as Irina still smoking.

Karasuma: But you can't just hire an assassin to work at a school. We'll have you do some teaching to keep up appearance.

He speaks while Irina walk to the door and open it.

Irina: I'm a pro. *glance at Karasuma* My job will done before I need to resort to teaching.

They are still kicking the ball toward Koro Sensei and try to hit him while Tsurugi sit at the side and playing game with his game console.

Irina: Koro Sensei! Oh, Koro Sensei!

They stopped and saw Irina ran toward Koro Sensei. Tsurugi stop playing and look up.

Irina: Karasume Sensei tells me that oh you're so very fast! Is that true?

Koro Sensei: *let go of the soccer balls* Well, not that fast...

Irina: *cute face* Could you do me a favor? I'd love to taste some real Vietnamese coffee. Won't you bring me some while I'm teaching English?

Koro Sensei: *turn pink* Why, of course. I happen to know a great café in Vietnam.

He immdiately burst in Mach 20 speed toward Vietnam, leaving cloud of dust. Tsurugi keep his game console in his pocket as he went to them.

Yuma: Er... Irina Sensei? Class is starting. Shouldn't we go back to class?

Irina: *take out another cigaratte* Class? Oh, right. Make it a study hall or something.

Taiga: Eh?

Irina: And... can you not call me by my first name? I'm not playing teacher unless that octopus is around, so you are to call me Jelavic-oneesama.

It makes the students confuse and felt the tense while Tsurugi finally know who she is.

Tsurugi(In mind): Irina Jelavic... A seductic killer... She's not my target in my previous jobs, but...

He went to Karma and whisper at his right ear making Karma smirk while Tsurugi just smile.

Karma: So what are you gonna do, Bitch-neesan?

Irina: No nicknames!

Karma: You're an assassin, right? The entire class working together can't kill that monster, and you're going to kill him all by yourself?

Irina: Brat. Grown-ups have their own grown-up ways of doing things. *turn to Nagisa* You must be Shiota Nagisa.

Nagisa: Eh?

Suddenly, she kiss Nagisa at the lips making others except, Karma and Tsurugi, really suprised.

Kaede: Aaaaaaaaaahhh!!

Irina kiss Nagisa until it reach 30 hits and she hug him at her chest.

Irina: Come to the staff room later. I'd like to see what you have on him. *let go of Nagisa* The same goes for anyone else with key intel! I'll give you something good in return. I can even swap in a man for you girls. It's a pro job to be good in techniques and connections. You brats go watch from the outfield.

The three man from before come with their weapons and stand behind Irina. They are the three thugs that Irina told to act in order to attract Koro Sensei.

Irina: Oh, one more thing: Interfere slightly in my assassination and I'll kill you.

Nagisa(In mind): Her skilled kisses makes you swoon. Her tough-looking companions. The gravity of her threat. We knew at once that she was the real deal: a professional killer. At the same time, most of the class sensed something: we hated here.

Karma: Well, first a student. And now a teacher, huh? It makes things even more interesting.

Irina able to hear it evem when she explain the job to the mens and turn around as she look at Karma.

Irina: Huh?

Karma: Yes?

Irina: I heard it. You're saying that one of you brats here is an assassin?

Karma: Well, if you wanted to believe it or not, yes. There is an assassin from all of us here.

Irina: Oh? *glancing at the students* So which one of them is the assassin?

Karma: Not telling ya.

Irina: So you're saying that you're the assassin in this class beside me?

Karma: Nope. It's true I see you can kill from close-range with your seduction way. But our assassin can kill from all range, and he's a pro just like you.

Irina: *smirk* Then tell your assassin to stay out of the way, or else. After all, I'm a pro among the pro.

Then she turn back to the mens and continue explaining the job. A bead of sweat appear at the side at some of the students head when they look at Tsurugi. Tsurugi keep looking down as he clench his fist and smirked with shadow cover his upperface.

Tsurugi(In mind): A pro among the pro? You're really think you're so high, huh, Irina Jelavic? Don't even think that you can kill Koro Sensei. If I can't, there's no way you can.

(Time Skip)

They all went back to the class. Irina keep looking at her tablet to see her plan and where the plan will be excecuted.

Irina(In mind): I've never killed an undentified creature like this before... Everything's ready. *look at Nagisa* The boy's shared his intel with me.

She winked at him and makes Nagisa shivered.

(Flashback)

He went to see Irina at the staff room just like she told him to.

Nagisa: Some of us have destroyed a single tentacle, but that doesn't faze him. One of us destroyed some of the tentacles but he stay the same. Maybe... you have to destroy all his tentacles at once. He can escape before you can deal the final blow. And... if you plan to sneak up on him, you probably shouln't smoke. For having no nose, Koro Sensei have a wicked sense of smell.

(Flashback Over)

Irina(In mind): That won't conflict with me plan. I am Irina Jelavic, a pro among pros--who pulled off assassination in all kinds of circumstances.

Hiroto: C'mon, Bitch-neesan, teach us already!

Rio: Yeah, Bitch-neesen!

Sosuke: I mean, you are a teacher here, right, Bitch-neesan?

Irina: Gahh! Quit your "bitch"ing! First thing, they pronounced differently! Your Japanese didn't differentiate between B and V! I'll teach you say V the right way! First, lightly bite your lower lip. Go on!

They did what like she told them to do.

Irina: Yes, right! No stay like that for an hour and give me some peace and quiet.

Everyone(In mind): What kind of lesson is this?!

Tsurugi: Irina Jelavic, known as the seductic killer because how she kills her targets.

They all, including Irina, look at Tsurugi. He tapping at his phone as he put a candy cigaratte at his mouth.

Tsurugi: You're really... annoying, you know that?

Irina: What? *walk to Tsurugi* Do you have problem with me, brat?

Tsurugi: *anime tick appear* Brat... huh? That kind of insult is the one I hate most.

Irina: I think you don't clear with me explaination before. *glare at Tsurugi* If you intefere with me assassination, I'll kill you.

Tsurugi: Heh. I'd like to see you try.

Irina: What?

Tsurugi: *look up* You said you kill me, right? But could you even kill me?

Irina: You asking for a death wish, you br--

Instantly, Tsurugi sits on his table and point his Gashacon Katana right at Irina's neck making her flinched.

Irina: What?

Tsurugi: Don't think that you're the only assassin in the class, Irina.

Irina(In mind): Wh-What is with this brat? I didn't saw him moving!

Tsurugi just smirk as he finish the candy cigaratte.

Irina: Heh. If you're an assassin, then why didn't I recognise? Other assassins can instantly know them.

Tsurugi: Because I'm the youngest, but one of the best. I'm the gaming assassin after all. Giving warning before kill and playing games. If you mess with me or my friends, you'll what comes next.

Irina: That phrase... *eyes widen* You're... Fuuma?!

Tsurugi: *evil smirk* That's right. That is why... don't mess with anyone here. If I can't even kill Koro Sensei, then you can't either, Bitch-neesan!

Everyone(In mind): He's so amazing!

(Time Skip)

Irina meet with Karasuma near the storage house outside.

Karasuma: I understand you've brought in rather a shady trio. That plan is news to me.

Irina: Yes: all pros, all more than competent. And tight-lipped. They're so in love with me, they'll do whatever I ask--for free. Everything's sets up. Today I act. By the way, why didn't you tell me that Fuuma was one of those students?

Karasuma: There's no reason for me to tell you that.

Then Koro Sensei come back from Vietnam and land hard as cloud of dust occured.

Koro Sensei: *walk toward them* Irina Sensei. He's the Indian chai you requested.

Irina: Oh, thank you, Koro Sensei! Just as I wanted for my afternoon tea! Actually, Koro Sensei, I'd like to speak with you. Could you come to the shed during fifth period?

Koro Sensei: Speak with me? *turn pink* But of course. Fifth period, right? I'll be there with certain-tea! Because that's chai tea, get it?

During Fifth Period...

Karasuma is teaching the students to shoot the targets. Tsurugi shoot the target with BBs at the center until it break into half.

Tsurugi: *sigh* Too easy...

Everyone(In mind): He act cool again!

He went to the other and walk beside Koki as he look at the right. He tap at Koki's shoulder making him look at him as Tsurugi point somewhere and Koki look where his pointing.

Koki: Hey, hey, you're kiddin' me?

The others stop shooting and look where Tsurugi and Koki look at.

Koki: They're goin' into that shed together!

Sosuke: Kind of a let-down, watching Koro Sensei fall for such obvious ploy.

Megu: Karasuma Sensei? I don't think we'll never warm up to her. Even Tsurugi don't like her attitube.

Karasuma: Apologies. She's a pro here on government orders. Still... completing all her preparation in a single day prove she's an assassin with the highest caliber.

Nagisa: Um, Karasuma Sensei?

Karasuma: Yes?

Nagisa: *point at Tsurugi* Look at him.

They all look at Tsurugi and saw he's fall to his knees as he palms on the ground and look to the ground with sad aura.

Tsurugi: *mumble* Karasuma Sensei, you said that I'm the only assassin fit for this job... You're so mean... You're so cruel... You said I'm the finest... I don't admit it, but it's too cruel...

A big bead of sweat appear at the back of their head.

Tomohito: He's down so fast...

Ryunosuke: Well, he is the kindest...

Tsurugi: *stand up* Still... there's no way she can kill Koro Sensei that easy. *look at the shed* I can feel it...

Yuzuki: Feel what?

Tsurugi: *shiver* There's something going to happen in there...

In the shed, Irina tries to assassinate Koro Sensei using her seduction and the trio blast him with the guns that they bring as Irina hides behind the boards and close her ears with her hands.

Irina(In mind): Live ammo and real guns. M61. M134. M249. All spraying ammos with superlative speed and firepower. These weird pellets won't come into play. After all, there's nothing these bullets couldn't kill. Firing complete in 3, 2, 1... *come out* ...ze--

She saw Koro Sensei still alive with no injuries except with his clothes get shredded by the bullets. But he able to sew them back.

Koro Sensei: Nehehehehehe. Unfortunately, Irina Sensei, lead bullets have no effect on me. They just melt inside my body. And take a good look at my face.

Irina: You have... four eyes?!

Koro Sensei: No, two of them are nostrils.

Irina: Who can tell?!

All the trio guys fall unconcious on the ground.

Koro Sensei: There's a metalic odor that wasn't here in the shed until yesterday. The old-man smell whose incongruity opened my nostrils.

It makes Irina remember what Nagisa said to her.

Koro Sensei: By pretending to be caught in your trap, I could easily uncover my assassin. *eyes shines in red* In other words... as a pro, you clung too tightly on the common-sense assassination. My students' attempts are far more flexible and formidable. *getting closer to Irina* And did you know? My retaliation takes the form of care and grooming.

Irina: Noooo!!

Those who outsides can hear the scream and slithery sound.

Hinata: What is that?!

Taiga: Gunshots, a scream... And now a slithery sound!

Irina: No~!

A bead of sweat appear at the back of their head.

Irina: No...

Even more sweat appears.

Taiga: She's getting slithered but good!

Hiroto: Let's take a look!

He, Taiga, Nagisa, Toka, Koki, Tomohito and Tsurugi went to the shed as Koro Sensei comes out.

Nagisa: Koro Sensei!

Taiga: How are the boobs?!

Koro Sensei: *pink face* I wish I could enjoy myself a little longer... *back to yellow* but I'm really looking forward to our classes together.

Nagisa: Wh-What happened in there?

Tsurugi: So smokey!

Then Irina came out but her clothes are different. Now, she's wearing retro gym outfit with a red headband tied at her forehead.

Toka: Ahh! Bitch-oneesama is wearing a wholesome, retro gym outfit!

Irina: 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 change in top speed... and do that slithery thing with his tentacles?

Everyone: *sweatdrop* What thing?!

Nagisa: *turn around* Koro Sensei, what did you do?

Tsurugi: *turn around* Is it something lewd?

Then Koro Sensei's face skin turn blank and look away.

Koro Sensei: Oh, you know, grown-ups need grown-up care.

Nagisa/Tsurugi: That's the face of a guilty grown-up!

He and his students walk back to class leaving Irina by herself.

Koro Sensei: Back to the classroom, now.

Everyone: Yes, sir.

Irina(In mind): This is unforgivable. I've never suffered such an unslightly failure! *take off the headband* I am a pro, and I shall repay him with this disgrace!

(Time Skip)

Back at classroom...

Irina change back to her normal outfit. The students felt uneasy because she didn't teach them anything. All she did is think about how to assassinate Koro Sensei.

Irina(In mind): That octopus better not think a pro like me already out of ideas. I'll need all new supplies.

She hits the table because angry.

Irina: Dammit! Why doesn't this backwoods school have Wi-Fi?!

Karma: You're trying awful hard, Bitch-neesan. Your pride must be in tatters after that.

Tsurugi: I already told you it's impossible. But you won't listen, Bitch-neesan.

Irina: Tch!

Yuma: Sensei?

Irina: What?

Yuma: If you won't teach us anything, could swap with Koro Sensei? We've got entrance exams this year.

Irina: Ha! You want that vicious creature to teach you? You think your exams compare at all to a planetary crisis? Must be nice being a clueless kid. Besides, I understand you E-Class students are the school's loser misfits.

It makes them feeling tense.

Irina: There's can be any point of studying now. I know, how about this? If my attempt succeed, I'll give you 5 million yen to share! That's far more than you'd gain from any pointless schoolwork! So shut up and do as I...

An eraser throw at her and hit the blackboard.

Hiroto: Get out.

She look forward and saw the dark rage aura surround them before they start shouting and throwing stuff at her.

Hiroto: Get out, you damn bitch!

Kaede: Bring in Koro Sensei!

Irina: Wh-Where'd this all come from?! I'll kill you all!

Sosuke: I'd like to see you try!

Kaede: Yeah, that's right! Down with big boobs!

Nagisa(In mind): *look at Kaede* That's your complaint?

Tsurugi: Get out from our class!

Karma: *turn to Tsurugi* You're joining, too?

Tsurugi: *turn to Karma* Yeah. We don't like her so I'd like to join in angry at her. Where was I?

Karma: Shouting and throwing stuff.

Tsurugi: Right! *back to shouting* We didn't need you here! *throw a paper ball* Swap with Koro Sensei!

Ryunosuke: Yeah! Like Tsurugi said!

After the shouting and throwing, Irina complaint about it to Karasuma at the staff room.

Irina: What is with those brats?! They're sharing space with a fine woman like me, and their not grateful?!

Karasuma: They're not--hence the classroom chaos. Go apologize to them, if you wanted to stick around for another attempt, that is.

Irina: Why should I? I have no teaching experience! Let me focus on assassination!

Karasuma: *sigh* All right, then. Come with me.

He shows where Koro Sensei is during this time. He is sitting on the lazy chair while writing tests question for his students.

Irina: What's he doing?

Karasuma: Writing test question. It's what he does every Wednesday during sixth period.

Irina: It sure seem to be taking a long time. At Mach 20, shouldn't those tests be written already?

Karasuma: They're different for each student. He writes individualized questions, taking into account students' best and worst subjects. He has advanced intelligence and speed, this dangerous creature who'll destroy the Earth. And his teaching work is almost to perfect.

Then Karasuma shows Irina what the students are doing now. They are training with cardboard knife and hit the ball with Koro Sensei's face.

Karasuma: Look at the students.

Irina: They're just fooling around.

Karasuma: It's training: how to accurately strike a moving target with a knife. Assassination badminton. I taught them that. Now look over there.

Then Irina look at the other side and saw Tsurugi, in his Rider form, taking out laser shurikens and throw it at the moving target. Fuuma hits the target and it breaked into pieces. Yuzuki clap her hands while Nagisa take some notes.

Karasuma: It's true that Aizawa is one of the best pro, but he still training and help other students to get even better. 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 of a pro, but if you can't be an assassin and a teacher, then this is the worst place for a pro like you. If you want to stay here and keep going after him, don't look down at the students.

After that, Irina apologizes to the students for her mistake and they accept her apology. But they that calling her as "Bitch Sensei" making it an annoying moment for Irina but very fun to the students.

Yukiko: Huh? Has anyone see Tsurugi-kun?

The class went silent as they look Tsurugi's table. There's no sign of him but his school bag still there.

Ryunosuke: Oh, right. He said he's going to try assassinate Koro Sensei.

Taiga: Again? He can't kill him, just able to cut his tentacles.

Irina: Eh?! He already can hurt that octopus teacher?!

Ryunosuke: Yeah. *point outside* Look outisde.

They look outside from the window and saw Fuuma keep trying to hit Koro Sensei with his sword. He pull his Gashat from the belt and insert it at his sword.

Gashatto! Kimewaza!

Fuuma: This time...!

Hurricane Critical Finish!

The sword glows in energy as he do some rapid slashes toward Koro Sensei as he keep dodging in Mach 20. As they stopped, it shows Fuuma able to cut five of Koro Sensei's tentacles.

Fuuma: Gahh! Another five!

Koro Sensei: That was a great moves, Tsurugi-kun.

Fuuma: Koro Sensei, are you okay?

Koro Sensei: *trembling hard* O-Of course, I-I'm fine! T-Totally fine!

"Koro Sensei's weak point #7: Afraid of Tsurugi's finishing move."

The whole class including Irina except for Karma surpised that he get Koro Sensei again. Fuuma just laughing at Koro Sensei because he scared of his moves while Koro Sensei trying to making him stop laughing.

To be continued...