Before we begin, there are two things that I want to say:

1. Irina won't be in Yamada's harem. Because it might upset the balance of the story.

2. One more girl (who is not Irina) will be added in Yamada's harem. Who is it? Will be revealed by the end of this chapter!

With that said, let's a go!

Chapter 4: Grown Up Time

(In a Convenience Store)

"Hey there, big teach! Long time no see!" The cashier greeted Korosensei as he put the shopping basket on the counter. Speaking for Korosensei, his skin pale as a human being, wearing fake nose, a wig, and seems to be wearing pants. My guess that he disguised himself like this...and somehow, it successfully fooling most people.

"I know right. Good thing it's payday." Korosensei replied as several minutes later, he comes out from the convenience store with a bags of snack with him.

"You're one stop shop for delicious snack. Well worth the trouble of going and got me though." Korosensei said to himself.

"Hey knock it off!" A voice said as Korosensei look towards the source. He sees a foreign woman being harassed by three delinquents. Now if Karma or Yamada was here, they probably beat them to bloody pulps by now.

"Relax, doll face." One of them assured her.

"Please...I don't have time for this! My students are expecting me!" She begged whilw struggling.

"So you're a teacher, huh? Care to me give one of us a private tutor?" One of them said with perverted looks. Unknown to them, Korosensei is right behind them.

"How about I'll be the one who give you miscreants some tutoring about flirting with ladies?" He said deeply as the three delinquents took notice of him. "Lesson 1: First impression." He said as he shove the delinquents inside the car. "You need to make yourself more presentable like so." Korosensei said as he wrapped the car with large pink ribbon.

"Why it have to be pink!?" They exclaimed.

"There is no lesson 2..." Korosensei said as he went towards the foreign woman. "Are you alright?"

"Ahh...who said chivalry is dead...?" The woman said as she went close to Korosensei. "You're a prince among men. Thank you, I will remember this kindness always. By the way, I'm trying to find Kunugigaoka Junior High. Do you know where it is?"

{Linebreak}

(Somewhere, ???)

At the same time in a certain someone's house, a certain male is still sleeping blissfully. Ignoring the sound of an alarm.

The reason? Here's this!

(Flashback)

Yamada was in a interrogation room with two of Karasuma's associates. Like Karma, he too was briefed about the situation of Class E.

"So let me get this straight. The class where I'm going are trying to kill the one who destroyed the moon, the students there are full of failures and lost causes, the said one who destroyed the moon is going to be my teacher, and if we don't kill him, the earth goes kablooey by March 13. Is that what you were saying?" Yamada asked after he recounted about what he was been told.

"Yes. Like the others, if you happen to tell anyone about this, we have no choice but to wipe your memories." The woman said.

"Okay. I'll see what I can do." Yamada said.

"That's good to hear. Also, according to your records, you're quite skilled in hand to hand combat, skilled in the use of firearms, and disarm an armed opponents. It also said that you fight against delinquents on a regular basis."

"So it been said. Just learn some self defense. My old man always telling me to train some in case I got in trouble." Yamada said.

"Good. Just want you to know that you'll be trained to kill your target while you studying." The woman said.

"And we get 10 billions, right?" Yamada asked.

"Yes."

"That's good to know. I'll fit in just fine." Yamada said with a smirk.

(Flashback end)

So...now you know. After that, he went tired and go to sleep...heavily.

Luckily, he start come around as he get up. "Hmm...what time is it?" Yamada said as he grab his phone from his desk. His eyes then widened at the time on his phone. "Freakin' 9.00 am!? I'm late!" Yamada exclaimed as he changes his sleepwear to his school uniform swiftly before grabbing his bag and go downstairs, leaving his room.

"Ah, Yamada. Took you long enough to wake up." Yamada's father said while reading a newspaper.

"Shut it, Pops! I overslept!" Yamada remarked as he grab a rice ball and put his lunchbox inside his bag. With that, he went towards the door.

"Have fun at school!" Yamada's father said as Yamada go towards his new school.

{Linebreak}

(In the satellite campus)

"Look alive, people. Prepare to meet the newest addition to the E-Class faculty." Karasuma said as everyone look towards Korosensei...but they are more focused towards the same foreign woman who Korosensei saved. Strangely, she's their new teacher.

"My name is Miss Irina Jelavic. It's nice to meet you all!" The woman named Irina said as she introduced. Then, the class wondered about how strange she closed with Korosensei of all people while the said teacher took off his disguise.

"We decided to bring on Miss Jelavic to teach English lessons. No hard feelings I hope." Karasuma said. "She's uh...very qualified."

"She really have a thing for Korosensei, huh?" Kaede asked with sweatdropped.

"Yeah. This might work out to our advantage." Nagisa said. "He seems thrown off by the attention she's giving him. The color of his face changes depending on the mood. What color for hot and bothered?" Nagisa said to himself as Korosensei stared towards Irina's...breast before his face changes to pink with perverted look.

"Well, will you look at that?"

"His falling over heels for her."

"Note to self: He likes women with big breast." Nagisa said to himself as he take note.

Korosensei's Weakness #5: He likes boobs

"Hey, sir." Isogai spoke up as Karasuma look towards him. "Hmm?"

"I heard there's going to be a transfer student from America today. So where is it?" Isogai asked.

"Is it a dude or a chick? It'll be great if it's a chick!" Okajima said.

"I just got a call from his father that he overslept. And he's boy by the way. But rest assured, he's one his way here." Karasuma said.

"Is he a foreigner or Japanese?" Nakamura asked with interest.

"He's Japanese. He and his family moved abroad 7 years ago. Now, they're moving back to Japan." Karasuma replied as this shock Yada.

'7 years ago...?! That's the same time when...' Yada thought before shrugs off her feelings. 'No...It's not possible. It can't be a coincidence.' She thought as she held the necklace tight. 'Or...is it?'

Her thoughts break as she kept hearing Irina flirting with Korosensei...which made Okano, Nakamura, Hayami, and herself glare towards the teacher.

'Don't fall for her tricks!'

'No women in their right mind would have a crush on you!'

That were their thoughts as class started.

{Linebreak}

Then the students and Korosensei are in outside while Karasuma and Irina is in the teacher's lounge.

"Of course I have the usual close range tricks at the ready. Apparently the art of seduction works on whatever the hell he is." Irina said with a change of behavior as she puts one cigarette in her mouth before lighting in up with a lighter.

"Irina Jelavic, first rate assassin. Beautiful, intelligent, athletic, fluen in dozen languages. No target can resist her charms, no matter what kind of nationality the target is. However, well guarded. She wrote books about infiltration and approach." Karasuma sai before looking towards the assassin. "As good as you are, we just can't drop you into this and expect the usual tricks would work. I know coverage is your specialty but this time, you'll have to teach." Karasuma said as Irina leaves the the room.

"Oh please, as if I ever stay here for long." She said while looking towards Karasuma with one eye. "The octopus won't be here for long once I done with him." She said as she go outside.

In the outside, The students were playing while trying to kill him,...first Karma tried to shoot him but failed then Okano tried to slice him but also failed too.

"Yoohoo! I hope I'm not interrupting anything~!" Irina said while pretend to be nice again as she go towards Korosensei. Whatever she's planning, she's up to no good.

(Meanwhile)

Karasuma is waiting outside the entrance of the satellite campus. The reason? To meet up with a certain transfer student that is.

Luckily, he doesn't have to wait long as the person recently arrived.

"I take it you're Yamada Hoshi?" Karasuma asked.

"Yes." Yamada answered.

"I'm Tadaomi Karasuma from the Ministry of Defense. I'm also in charge of this class's PE." Karasuma said as he offered his hand to the boy. "It's nice to meet you."

"Likewise." Yamada said as he take and shake the man's hand.

"I'm sure you have been briefed about the situation." Karasuma said.

"You can thank your associates for that." Yamada said.

"Okay then." Karasuma said.

"So...where's the class at? I didn't hear sounds of them inside the classroom." Yamada asked.

"Good hearing. They're in the backyard, playing." Karasuma answered.

"Okay." Yamada said. "Can you take me to them?"

"Of course. But first, I'll give you some tour." Karasuma said as they went inside. They walk towards the faculty room. "This is the teacher's lounge. Though they are just the three of us including your target."

"Okay." Yamada said before walking towards the classroom.

"This here is your classroom." Karasuma explained before finally walking towards the door that leads to field.

"And finally, this door leads to the field in the back. Any questions so far?"

"Two." Yamada said.

"Fire away."

"This class is nothing but sacrificial lambs to the higher class, right?"

"Good observation. This class are leftovers of the elite and the worst of the worst." Karasuma answered.

"Two, that foreign woman over there who just kissed that blue haired boy/girl...She's not a ordinary teacher is she?" Yamada asked as he saw what is happening through the window, which involves Irina kissing Nagisa before the same three men who harassed her, who turns out to be mercenaries. Now, if you put the pieces together, that incident earlier was just an act.

"Good observation." Karasuma complimented Yamada. "That's Irina Jelavic, a professional assassin." He explained as they go outside, but the class are still shocked about Irina's femme fatale specialty that they didn't notice the duo entering.

"A fair warning for those who knows our job, get in the way, you die." Irina said dangerously tone of voice as she takes a gun from one of them. For some reason, this make Yamada smirked.

"Is that sound like a threat? Why am I not feel threatened right now?" He said aloud as Irina and the class notice him.

"Whoa! Where did he comes from!?" The class exclaimed.

"Um...I've been here for awhile...maybe." Yamada said.

"Sir, who is that?" Isogai asked.

"This is Yamada Hoshi. The transfer student that you mentioned this morning."

"That's him?" Maehara asked.

"Well, he's a hottie." Nakamura commented.

"Hey, brat..." Yamada then look towards Irina, who doesn't take lightly of the boy's response. "You got some nerve to stand up to me? Are you really want to die?" Irina asked with a dangerously tone of voice, but she got ignored as Yamada went towards Kataoka.

"Hey there, Meggy! I don't know you're in this class!" Yamada said to Kataoka.

"Oh, h-hey there, Hoshi." Kataoka said while trying so hard to not to blush.

"Just call me Yamada." Yamada said.

"Hey, don't ignore me!" Irina shouted while Yamada set his eyes on Yada,...which the boy senses a familiar sensation as he walk towards her.

"Hmm..." He hummed as he stare towards Yada...closely.

"Is there something on my face?" Yada asked as Yamada puts his hand on his chin.

"You look familiar. Have we met somewhere before?" Yamada asked. Just before Yada could answer, Irina shouted.

"Hey, I'm talking to you, brat!"

"Why do you want, yellow bitch?" Yamada asked deviously as Irina is becoming more pissed.

"That's it!" Irina shouted as she look towards her three men. "Teach that twerp a lesson!" She ordered as men ready to attack Yamada...but the he held his hand.

"But first, let's see you beat my ass when I'm blindfolded." Yamada said as he take off his tie before wearing it to cover his eyes. "Okay, I'm ready!"

"What the hell is he thinking!?" Maehara exclaimed.

"He's going to get himself killed!" Sugino added.

"No, he won't." The class then look towards Karma.

"How can you be so sure, Karma?" Isogai asked.

"Why don't you just found out yourselves." Karma said.

"You're really think that you can actually win while blindfolded? You're a bigger fool than I thought." Irina said.

"I don't need my eyes to see where I'm hitting." Yamada boasted as he goes on a fighting stance.

"That attitude of yours really pissed me off!" Irina then look towards her mercenaries. "Beat him to a bloody pulp!" She ordered as the three men charged towards Yamada.

"Come at me, suckers!" Yamada said as the necklace he was wearing revealed itself, which made Yada surprised as she recognized it.

'*gasp* That's the same other necklace Ya-Kun was wearing!" She thought. 'Is he who I think it is!?' Yada thought as she covered her mouth. 'Ya-Kun...'

With Yamada, he managed to dodge the attacks.

"You call yourselves mercenaries? If you can't beat a guy like me, there's no chance in hell that you able to kill the octopus." Yamada mocked them.

"Why you little shit!" One of them shouted. Just as he's about to punch Yamada, the boy counters with a kick to the gut, then knee kick him, knocked him out in the process.

Then he proceeded to german suplex the another one before ending it with a chop to the neck, rendering him unconscious.

"Wow, he's good." Kimura commented.

"Dude got some skills." Hazama added as Kataoka, Yada, Nakamura,..and also Hayami and Okano is also impressed by Yamada's fighting prowess. Yamada then defeat the last men with a flying triangle hold. It takes several minutes before the guy give in and fainted.

"Well you look at that, he fights like the octopus." Karma commented, though he witnessed Yamada's fighting prowess first hand

'For a newbie...he's quite agile. Maybe he can teach some of-" Okano thought before she realized what she was thinking and her face is red as a beet. 'Wait, what did I think about him!? I'm not falling for him or anything!'

"Why you-"

(Bang)

She never gets to finish as she felt something grazing on her cheeks with a small trail of blood comes out from it. How? Yamada takes a gun from one of unconscious men and he shoot it before Irina.

'Unbelievable. I know I was told that he is able to take down an armed group of gangsters in the states, but never thought he could apply it in taking down professional assassins.' Karasuma thought as he one of the people who is impressed. 'I got nothing to teach assassination about him. He's able to keep up with the pros.'

"Words have consequences, Miss Jelavic." Yamada said with a dangerously tone of voice. "I don't care how many people you killed...mess with me, and you'll pay the price...same can applied to all of the students here." Yamada said as he drop the gun. "Rethink your thoughts twice and choose your words carefully if you don't get yourself killed." He said as he went towards Yada.

'He might as well the second Karma, only he's lot more dangerous.' The class thoughts about Yamada. Just as Yamada is near Yada, he tripped over a rock.

"Oh not good." He muttered as he falls on top of Yada...with them kissing on the lips.

"EHHHHHHHHHH!?" Most of E-Class exclaimed.

The girls who aren't Yada, Kataoka, Nakamura, Hayami, and Okano look away the other four just blush at this for some reason. The boys who aren't Karma just said what Okajima and Maehara expresses jealousy that Yamada kissed Yada saying "Lucky bastard!", who is thought to have the largest bust size. (Though Takebayashi and Nagisa, the former reserved and calm while the latter jaw dropped). Karma just smirk at this while Nakamura took pictures of this.

Yamada then get up. "Sorry! That was an accident-"

"Get off!" Yada said as she pushed Yamada off. She then stand up before get away from Yamada while covering her mouth.

'Okay...Ms. Jelavic being an assassin is one thing, but this transfer student is on a whole new different level, this class is getting stranger...especially that he's quite skilled to take on three trained mercenaries.' Nagisa narrated. 'I have feeling... this Yamada Hoshi is no ordinary boy.'

"I'm telling you its just an accident!" Yamada argued.

"Shut up! I don't want to talk about it!" Yada retorted.

'But I also have feeling...Yamada will play an important part in our assassination...' Nagisa narrated.

{Linebreak}

After everything calmed down, the class returned to their classroom. Yamada sits beside Karma. Irina supposed to teach...but she ignored them. She is recently informed about Korosensei by Nagisa.

"Ms. Jelabitch, are you going to teach us or not?" Maehara asked as he misspelled Irina's name.

"Yeah, come on Ms. Jelabitch." Nakamura added.

"No offense or anything, but aren't you a teacher, Ms. Jelabitch?" Sugaya added as Irina is really pissed about the misspelling her name.

"Aah! Enough with the bitching! The name is Jelavic, understand!? Jelabitch is I'll be if you don't get the different through your thick preemptive skull!" Irina reprimanded. "Let's review! My name is Jelavic, Jela-Vee-ich! Bite your lower lip and hum!" She said as everyone excluding Yamada and Karma do as Irina told.

"V-Excellent! Now practice that sound quietly for the next hour while I ignored you."

'Lamest lesson ever!' That's what everyone excluding Yamada and Karma thought in their minds.

Yamada sighed before standing up. "Guess I have to play the teacher now." Yamada said as he marched towards Irina.

"What are you-"

"Gimme this shit!" Without warning, Yamada take the tablet she was holding, surprising the class.

"What the hell!?"

"First you threatened the class, now you refused to teach. You're a sorry excuse of an adult, you know that." Yamada remarked.

"What did you say!?" Irina exclaimed angrily.

"You heard me loud and clear! You literally acting like a bitch and a third rate assassin!"

"Third rate!? Why you-" Irina stopped herself when Yamada grab her by the cheek while giving her a dangerously glare that rivals Karma.

"I'm going to make myself clear so you can understand. When class is in session, it's a teacher's duty to teach. If you can't do that, why don't you plan your assassination attempt elsewhere? You understand? We students are here to study, to gain knowledge, not taking crap from you." Yamada said while the class just stare at him.

'He's a badass' Everyone who aren't Karma thought. Yada stared at him with surprise. 'What he has been doing for the past 7 years?' She wondered. She saw her childhood friend subdued three trained mercenaries before shoot with a gun. Despite that, she smiled while hold onto the necklace. 'But he's still the old Ya-kun to me.' She said with a smile as Yamada gives the seductress her tablet back before storming off the classroom.

"*clear throat* Since Ms. Jelavic refused to study, I'll be the one teaching you some English...until she is ready to teach you." Yamada said as this surprise the class.

"You're going to teach us?" Isogai asked.

"Yup. If you look at your reference book and stop talking, we will begin..." Yamada said as he start teaching English to the class...

(The next hour)

The school's bell can be heard, signaling that the class is over.

"Okay, that's enough for today. Just reviewing what I taught to you and it will serve you well." Yamada said as he went towards his seat. Before teaching the class, Yamada had the class to give their names.

"I'm surprise that you literally can teach English, man." Maehara complimented.

"When you're in USA, you'll pick up a thing or two." Yamada replied.

"Seriously, you teach like the octopus." Okajima commented.

"Yeah, you're surprisingly good at it too." Isogai added.

"You're kidding right? I'm not that smart, you know." Yamada said.

"Don't be like that. We thank you, though. Hadn't you stepped in, we would've spent the next hour doing that crap." Okano said.

"Why thank you, Hina." Yamada said.

"Hina?" Okano asked.

"It's your nickname." Yamada said before rubbing the back of his head. "I have an habit of calling someone by nicknames. If you don't like it, I'll just call you Oka-"

"No! No need. I'm pretty comfortable of you calling me that." Okano said as she blushed. Yada saw this as she glared Yamada with jealousy.

"In any case, see you man!" Maehara said as he and Isogai left.

"You're a huge help back there, man! Thanks." Okajima said as he too left, leaving only Yamada...and Yada.

"Now then..." Yamada said as he put his books into his bag before grabbing the said bag, ready to leave...at least that's the plan.

"Yamada." The boy then look towards Yada, who is calling his name.

"Can I walk with you?" Yada asked.

"Knock yourself out." Yamada said as they left the classroom together.

{Linebreak}

They're now walking together on their way home.

"So...why you want to walk with me?" Yamada said.

"Well...its because of this..." She said as she shows the transfer student her necklace, one that Yamada know too well.

"Hold up...there's only one person I gave that necklace. And its-"

"Me." Yada finished his sentence. "If you're not convinced,...say my nickname. The nickname that Ya-Kun, the boy who I befriended, gave to me." She said as Yamada widen his eye and his jaw drop.

"Tou-chan...?" Yamada said as Yada hugged him with tears on her eyes. And so is Yamada...

"So...I was right...You really are Ya-kun..." She said. "I...missed you...so much..."

"I missed you too,...Tou-chan." Yamada said as Yada let go of him.

"You still wearing that necklace?"

"Of course." Yamada then show her his necklace. "It's my good luck charm."

"I'm glad." Yada said as she wipes her tears.

"Hey uh...is it okay that I call you by your first name? I feel embarrassed if I call the nicknames when we were kids.." Yamada asked.

"Of course you can,...Yamada." Yada said.

"Great." Yamada said. "You want to eat? It's on me."

"Okay. It's also a good opportunity to catch things up." Yada said.

"And...sorry for kissing you." Yamada said sheepishly.

"No...if anything, I'm sorry." Yada said as she and Yamada went to dine somewhere, talking about stuffs. Several hours later, they went to their separate ways as they on their way.

{Linebreak}

(The next day)

Irina and Karasuma are currently in front of the satellite campus's store shed.

"Are you sure this is going to work? I understand that you brought rather questionable trio." Karasuma said.

"Don't judge the books by their cover. Their professionals, so long as they are head over heels to me, they'll do what I asked them."

"Yes...Before Yamada subdue all of them like it was nothing that is..." Karasuma said.

"The kid just got lucky!" Irina said angrily as she refused to acknowledge Yamada.

"Oh really...? He defeated three professional mercenaries rather easily and managed to intimidate you, a professional assassin. And I heard he's teaching English in your place yesterday since you refused to teach. As long as I'm concerned, that wasn't the display of his luck to me...but that was the display his skills." Karasuma said.

"Anyways..." Irina said as she changed the subject. You may not know it but she rather salty after Yamada humiliated her...twice. "Just enjoy the show...it's go time." Just as she said that, Korosensei lands in front of the two adults.

"I'm here, madamoiselle! With the Indian cha tea you humbly requested!" Korosensei said while holding the said tea.

"That's great! My afternoon tea will be amazing!" Irina said as she get on her acting. "Why don't we talk somewhere private during, hmm? Like in the storage shed? After the fifth period?"

"Anything for you, my darling~!" Korosensei said as he agreed...little do Irina know, Korosensei has seen through her plan. How? Let's find out!

(In the fifth period)

The class is currently practicing their used of firearms aka guns.

"Looking good, Yada! Nakamura! But keep it up!" Yamada said. "And keep your eyes on the target! That goes with all of you!" Yamada said loudly. Before this began, Karasuma choose Yamada as his assistant of PE. The reason? The man from the Ministry of Defense was impressed by Yamada's fighting prowess.

And also...Nakamura has been flirty with Yamada since morning with her giving him a playful smirk. How it happened? Here it is!

(Flashback)

Yamada and Yada-I mean Touka we're walking on the path towards the school. Since they're reunited at last, they decided to walk to school together.

"I still can't believe that you got sent to E-Class just because of skipping class to take care of your kid brother." Yamada said to his childhood friend as they walk.. "Can the school just let it slide?"

"Nope. The rules the principal made are pretty strict." Touka explained.

"Too strict if you asked me." Yamada commented.

"Yeah..." Touka said as they arrived. But...

"You two seems awfully acquainted, why is that?" Both of them turned around and see...Nakamura with mischief smile.

"Hey...you're Rio Nakamura, right?" Yamada asked.

"Yeah, that's me." Nakamura said. "Can I asked you something?"

"Shoot." Yamada said.

"What are your thoughts about this?" Nakamura said as she shows them a foto of them kissing from yesterday.

"Holy-!? You took pictures of that!?" Yamada exclaimed while blushing...though Touka also blushing too

"Delete that!"

"Yup. If you want to me to delete it..." Nakamura said with flirtatious tone as she get closer to Yamada. "Go on a date with me..."

"Ehhhh!?" Both of them exclaimed.

"I'm just messing with you two." Nakamura said.

"That's a relief." Yamada said as he sighed in relief and so is Touka.

"But..." Nakamura said. "...I want to get to know you better." She said as Yamada sweatdropped. This might be interesting...

(Flashback end)

So now you know...then Yamada meets with Korosensei for the first time. The octopus asked how will Yamada going to kill him which the boy responded by looking for an opportunity to do it...but he said that he'll do it in group

"Hmm?" Yamada then sees Korosensei and Irina about to enter the storage shed.

"Seriously? He's really falling for it?" Mimura asked.

"From the looks of things, yes." Sugaya replied.

"Mr. Karasuma, sir." Kataoka said to Karasuma. "I know she's a professional and everything...but she's really hard to getting along with." She complained as the class agreed with her.

"I can see that. Sorry that you have to put up with her. But the higher-ups think that she's all that..." Karasuma said as Irina enters the storage shed. "But...seeing that she's able to put together in such a short time...thus tend to agree with them."

"She's going to fail." Everyone then look towards Yamada.

"What makes you say that, Yamada?" Sugaya asked.

"One, Korosensei has noticed the scent of the those men and their weapons at certain point. Two, he seen through her ploy, which he decided to play along. And three, I think they're not going to use the Anti-BBs."

"Whoa..." Maehara said.

"This is just a hunch, my friends." Yamada said as Karasuma stared at the boy with shocking expression.

'This kid...is unbelievable...If those were true...then it's sad to say...this plan has failed from the very beginning...' He thought.

(In the storage shed)

"So what are you gonna to talk about, Ms. Irina?" Korosensei asked as she turns around and start to take of her coat.

'Infiltration is an art...one that requires flexibility and finesse...he's mine...I just have to act quickly before he gets suspicious.' She thought...but little does she know, this plan has failed...because of three flaws.

"Oh Korosensei~! I can't simply control myself when I'm around with you~!" Irina said as she continued her ruse while Korosensei is in blushing face. "Your body, your strength, and everything about you makes me mad~! I'm long to be with you!

"Well...uh...you see..." Korosensei said as becomes a blushing mess.

'Yeah that's it...all eyes on me.' She said in her mind as three men are in position to shoot. 'I fixed this place all night just for you...and only for you, dirty boy.'

"You know...is it okay that I took of my clothes for you? I need to get change." She said while still acting.

"Of course! By all means!" Korosensei said.

'Goodbye,...freak. It was fun while it lasted.' She thought as she went behind some portable boards. Then, Korosensei is struck with millions of lead bullets...but the question is, how the lead bullets have any effect to Korosensei?

'Live ammo, big guns. M61, M134, M249, with enough speed and firepower, they're capable of wiping out a small army.' She thought as she look towards a gun full of Anti-Korosensei BBs, bullets that she SUPPOSED to use when killing Korosensei. 'Who needs BBs when you have the real thing? I'm a pro, I'll stick with actual weapons thank you very much.' Oh, how unwise of her. 'Assignment completes in 3...2...1.' She thought as sound of gunfire stop. She then went to see the results. But...

"Huh!?" She exclaimed as she saw her target is still alive.

"Hahahaha! Noble efforts, madam. But lead bullets have no effect on me whatsoever!" Korosensei said as one of his main tentacles is extracting the bullets. "The moment they enter my body, they melt." He said as he shows the assassin the melted bullets.

"Now...look closely to my face and tell me what you see?" Korosensei said as another pair of "eyes" appear just below his eyes.

"You have four eyes!?"

"No...two of this below are nostrils." Korosensei corrected.

"How am I supposed to know that!?" Irina exclaimed.

"I noticed that there's a distinguish metallic odor in here, along with the scent of three unfamiliar men. The moment it hits me, I knew something wasn't right." He said as the three mercenaries were knocked out unconscious. This make Irina realize what Nagisa told her.

"For a guy without a nose, he's a bloodhound."

"So you see, I PRETEND to be ensnared by your ruse. Fun but all for nothing!" Korosensei said as he revealed to have seen through Irina's ruse, just as Yamada expected. "I expose you for the uncreative act you are!" Korosensei said with star eyes. "You could learn a thing or two from the students, they're assassination attempt is more imaginative!" He said as he get closer to Irina. "Oh and just out of curiosity, did the government mentioned to you that my preferred method of brutalization...is grooming...?"

(In the outside)

"NOOOOOOOOO!!" Irina screamed followed by Korosensei's laughter.

"Hmph, just as I suspected." Yamada said as the class were questioning about what's going on in the storage shed.

"Noooooo..." Irina said while moaning...followed by slithering noise.

"Noooo~!" She said again as everyone sweatdropped.

"That's one thing that I didn't suspected." Yamada muttered.

"I REALLY need to know what he is doing to her." Okajima said curiosly.

"Then let's find out!" Maehara said as he along with some students including Yamada run towards the storage shed. As soon as they arrived, Korosensei just come out the storage...and it seems that his clothes are damaged as he knitted some to cover the holes.

"Korosensei!" Nagisa called.

"Did you touched her boobs?" Okajima asked.

"If only I got the time to get REALLY thorough..." Korosensei said with blushing face before turns back to normal. "But class isn't going to teach itself, is it children?" Korosensei said as Irina comes out from it...with an old school gym outfit and a red headband.

"That is...interesting." Yamada commented as Irina said something her back has been loosens by Korosensei's massage treatment before Korosensei changes her clothes. Then she something about him doing something with his tentacles before drops to the ground, unconscious.

"What thing with his tentacles!?" Okajima exclaimed.

"Korosensei, what did you do to her?" Nagisa asked as the person he asking do a blank expression.

"Adults...sometimes need special care.." He answered vaguely.

"I don't trust that look..." Nagisa said.

"Come now! Back to the classroom, boys and girls!" Korosensei said as they are heading back inside.

"Yes sir." They said as Irina starts waking up.

"Unbelievable,...first that brat and now that freak...! I nevet been felt so humiliating on my life...!" Irina said angrily as she take off her headband. "I'm a professional dammit! The octopus and that little bastard will pay...!"

{Linebreak}

Later on, it's time for English class...it would since Irina just doing with her tablet, to search some capable mercenaries.

'If that yellow wriggling monstrosity thinks that I'm out of ideas, then he got another thing coming! I just need to refresh some supplies..' Irina thought as her tablet suffered a connection problem.

"Oh come on! What's with the wi-fi on this place!? Where are we? Mars!?" She complained loudly.

"Wow. Looks like Ms. Jelabitch is pissed off. Don't you agree, Yamada?" Karma asked his partner in crime.

"Yup. I would be pissed too if my plan got ruined." Yamada agreed with the red haired boy.

"Uh...Miss Jelabitch...?" Isogai called the blonde assassin.

"Hm? What?" She answered rudely.

"If you're not going to teach us like yesterday. Is it okay we swap you out for either Korosensei or Yamada-

"Sorry man! I can't help you with entrance exams!" Yamada shouted from the back. The class rep shocked how did he know what he was going to say...but decided to shrug it off.

"As Yamada said, we got entrance exams coming up and-"

"Ha! You want to swap me out for that disgusting creature!? You're all worried about entrance exams when the planet on notice? Must be paradise not knowing your ass from the hole on the ground. Give it a rest! Entrance exams are for students WITH a future! Which none you jerkwads have any!" Irina mocked the class as everyone take that as an insult.

"*whistle* Major disrespect! You're all just gonna take that from her?" Yamada said as he "adds more fuel to the flame". They're slowly pissed at her for...you know, a bitch.

"How about this kids, forget the studying! Help me brainstorming about how to kill the octopus and I'll give you a nice percentage of the reward money! That's the best deal you E-Class jerkoff get a deal in life!" Irina said, unknown to the students rising anger. "Otherwise, enough whining and-" She never gets to finish as Isogai throw his eraser at Irina...though it misses, but it got her attention.

"Get out." He said as everyone except Nagisa, Yamada, and Karma glare towards the blonde assassin. The atmosphere went quite before...

"NOW YOU'RE JUST PLAIN OLD BITCH!" Sugaya shouted as everyone except the aforementioned trio throws school utensils at her.

"THAT'S IT! I'LL MAKE YOU RUE THE DAY YOU ARE BORN!" Irina shouted while being pelted by the class.

"YEAH GO AHEAD! WE DARE YOU, BITCH!" Sugaya replied loudly while continuing to throw something at her.

"YOUR BOOBS ARE WAY TOO BIG FOR A TEACHER!" Kayano shouted while holding a sign that said in japanese, "No big boobs!"

"Seriously!?" Nagisa exclaimed.

"Nice one." Karma said to Yamada.

"I kinda expected something like this will happen sooner or later." Yamada replied.

Karasuma face palm while frustrating.

(In the teacher's lounge)

"Someone should slap the piss outta them! I am TOO a fine woman being one up by a bunch of punks!" Irina complained. "They're lucky they're not licking the bottom of my stilettos!"

"In case you didn't know, sweetheart. The kids don't really agree with that assessment." Karasuma reprimanded her while typing something in his laptop. "If you're gonna stick around for another attempt, I suggest you suck it up, march in there, and apologize."

"Do what!? Look, I'm an accomplished assassin! Not a glorified rug rat ranklers! Just let me do what I'm qualify for!" Irina said as she refused to apologize to the class.

Karasuma sighed before standing up. "Alright then, follow me." Karasuma said as the duo went somewhere.

They walked towards a spot Korosensei used to enjoy. Korosensei himself is making test questions...hand written...with Mach 20.

"Okay, so what the hell is he doing?" Irina asked.

"Pouring over and writing out test questions. He done this every Wednesday sixth period since I've been here." Karasuma replied.

"Quick is that bastard is, it didn't take him that long. I mean at Mach 20, I can only imagine test are written out and are ready to go by now."

"They're tailored to each individual student."

"Huh?" Irina gasped.

"He takes account of subjects that good at where they need improvement. And hands out tests specifically for them." Karasuma explained.

"No denying that Chiba has spatial relation down path. Let's give him a question that really kick starts his lateral thinking."

"His IQ is off the charts. His speed able to put every weapon we have to shame. He's dangerous, contradictory, and a damn near perfect teacher." Karasuma said as he and Irina move towards the field in the backyard. The students are currently playing while practicing assassination at the same time. The assassination part because they held a cardboard version of the knives.

"Now take a look at the kids and tell me what you see." Karasuma ordered as he point towards the class.

"They're just screwing around." Irina answered.

"They're find tuning the necessary high coordinations skills on a moving target. I called it assassination badminton." Karasuma said as Sugino strikes a ball who look likes Korosensei.

"Everyone have goals here: Assassin and students, teacher and target. It's a bizarre classroom this creature create it. It's not a place for easy answers and tiny resolutions...or one we could fit ourselves into simple categories. I understand you're here because of your job. But if you can't cut as BOTH teachet and assassin, you're toast."

"Sorry, Yada, I win this round!" Yamada said.

"Well I'll get you next time." Touka said.

"You want to stay here, keep at it, be my guess. I don't mind." Karasuma said as he turn around. "Just treat those students with respect."

{Linebreak}

(In the classroom)

"You're turns out be Yada's childhood friend? The same one that moved to the states?" Nakamura asked Yamada.

"Yes." Yamada replied.

"That's saying something. What's Yada looks like when she is with you?" Okano asked.

"Let's see...there's this one time that she-"

"Yamada! Don't tell them that!" Touka shouted.

"Okay okay. You always asked me to-"

"I said don't mention it!" Touka comically shouted.

"Okay okay..." Yamada said as he held his hand up as Nakamura close to his ear.

"So what happened that make her act like that?" She whispered to the boy with mischief look.

"Nothing importantly really. Just minor stuff." Yamada whispered back.

"You do know I can hear you two, right?" The duo turn towards Touka.

"And Yamada, for the last time, don't mention that!" Touka yelled.

"Okay I'll stop...for real." Yamada said as his hand is raised before looking towards Okano. "What makes you got sent to E-Class, Hina?"

"Well...bad grades and stuff." Okano answered sheepishly.

"Okay. One more question." Yamada said before speaking. "Heard from Maehara that you are quite acrobatic. Is this true?"

"Yeah. I was a member in the Gymnastics club. But got kicked out once I got sent to E-Class."

"I see...Wanna be my dance partner then?"

"Dance partner!?" Okano exclaimed as her fast turn beet red.

"Yes. Like break dancing and such. What do you say? If not, I understand." Yamada said.

"No no no, I don't mind at all!" Okano said as Nakamura look at the former gymnastic club member.

"Okano...do you have a crush on Yamada?" She asked with a devious smile.

"No! I don't! What makes you say that?!" Okano denied before asking.

Just as Nakamura about to answer, Irina enters the classroom before writing something on the blackboard, cue the class sitting on their desk. Once she's done, it said in the whiteboard: "You're incredible in bed."

"What word does "incredible" modify? Come on, you know this one!" Irina said as everyone shift their attention towards her.

"Read it out loud." Irina said.

"Y-You're incredible in bed." Everyone...well most of them read it loud.

"I once took out an American VIP...literally. I have my feminine grace to thank for getting me close to the target. The dude fell for me hook, line, and sinker. "You're incredible in bed." He told me. So "Incredible", in this case, modifies the the word "you"."

'That's the example you use for junior high school kids!?' Nagisa exclaimed from his mind.

"To learn grammar, you got see how it works in the real world. Like a full emergence course in the foreign language. Take a lever that speaks, you can't miss." She explained.

"I know grammar seems boring and technical but its underpins how we communicate. Communication is key in my line of work and in life too. Whether you're speaking English, French, Portuguese, and what have you. People all have underlying need to express their feelings, that's why it's important. The examples maybe risky, but they come from real life scenarios. Things like "Sat by me." or "To me" by someone else. And who knows, you use or hear this yourselves."

'Communication...!' Nakamura and Okajima thought dreamy look...the former look towards Yamada, which the boy noticed her staring at him.

"Hmm? What's up, Nakamura?"

"No reason." Nakamura said before turn towards Irina.

"Don't expect me to be like the octopus, he can help you with entrance exams, which is without value I suppose. All I can do is teaching you the art of conversation." She explained. "Here's the deal: If you after awhile you find this is stupid or something about I'm not teacher, then fine. I'll give up my assignment and leave." She said.

"This make us even, right?" Irina said before blushing embarrassingly...all tsundere like. "And...sorry for being...you know, such a bitch. Especially you, Yamada. I'm sorry." Irina said awkwardly as the students were silent...before bursting to laughter, which confuses the blonde assassin.

"Wow, talk about one eighty! First you trying to kill us, now you're acting like a wuss!" Karma said.

"Yeah! You're weird sometimes." Yamada added.

"I gotta say, making more convincing teacher with this attitude!" Maehara said.

"That means we shouldn't call you Miss Jelabitch anymore." Okano said.

"Wuh...you're giving me a chance? You're all not upset with me?" Irina asked.

"To be totally fair, we don't exactly get on the right foot without the nickname."

"Maybe not, but we need to call her at least something."

"How about...Miss Helabitch?"

She took an offense to that, but decided to shrug it off.

"Or...we could move away from the whole bitch. I'm not opposed if you call me by Irina if you guys-"

"Sorry,...I don't think this whole "bitch" thing will be going away anytime soon." Maehara said.

"Yeah. "Irina" is a pretty name and all but its not as fun as saying "Helabitch"." Okano added.

"You're right about that one, Hina." Yamada agreed.

"Professor Bitch sounds classy, how about go with that?" Kurahashi suggested. Little do they now, a certain someone is getting angry by the minute.

"Oh yeah! Professor Bitch all the way!" Okajima agreed and so is everyone.

"GRRRRR!! I HATE YOU LITTLE TURDS SO MUCH!" Irina yelled as hilarity ensues.

Meanwhile, Korosensei and Karasuma was watching the scene the entire time in front of the classroom.

"She seems to be settling in nicely." Korosensei said.

"Well...more or last." Karasuma said.

"DO YOU KNOW WHO YOU ARE MESSING WITH!? I WILL END YOU!" Irina's scream can be heard from the outside as Karasuma secretly pulls out a gun that filled with Anti-Korosensei BBs. But stopped when Korosensei speaks again.

"Thank you for bringing a new teacher, Mr. Karasuma. She's a bit rough around the edge perhaps, but a welcoming addition to our little family." Korosensei said without looking towards Karasuma. "Who better to screw up the language art syllabus than a global trotting assassin/temptress like her?"

'Impossible...There's no way you seen this coming.' Karasuma thought as the octopus is leaving. 'Everytime I asked why he started teaching E-Class, he always dodges the question. But whatever reason, he turns it not only a perfect training ground for assassins...but also a training ground for live.'

"You're so adorable when you're mad." Kurahashi said casually.

"NO I AM NOT!" Irina shouted.

'Bastard's got us all wrapped around his tentacles. He knows what he was doing...no doubt it.' Karasuma said as he puts away his gun while Korosensei pick ups his food and decided to go somewhere with it.

{Linebreak}

(Somewhere in the street, After School)

"So what are you going to talk about, Okano?" Maehara asked.

"Need your advice on-"

"Yamada, right?" Maehara asked as the girl went silent.

"Maybe..." Okano answered awkwardly.

"Why not talk with for a few days before doing something else." Maehara suggested.

"Okay, talking. I can do that." Okano said as Maehara fold his arms.

"Let me guess, this has anything to with Yamada's fighting skills?" Maehara asked as Okano was silent.

"...I'll take that as a yes." Maehara said. "Look, just talk with him for now, okay? Once you're done with that, you can decide what are you going to do next. Take your time to think, okay?" Maehara advised.

"Okay." Okano asked.

"That's good." Maehara said. "Well, got to get going now. See ya!" Maehara waves goodbye as he left Okano.

"Talking with him, huh? I can do that." Okano said as she continued walking with a smile.

Next: Chapter 5: Assembly Time.

4's out! I hope you like it!

Fun Facts:

-There are some original scenes if you haven't noticed.

-This is one of my favorite part in the canon.

As promised, the one girl that we will be in Yamada's harem is...Yukiko Kanzaki! That makes six girls in Yamada's harem!

Review this is if you like it! And Happy holidays!