A/N: I changed my mind, Y/N would be a tsundere bc my OC (the real actress behind Y/N) is also a tsundere. And she won't be here yet, wait patiently for her appearance!
Here're the rules:
Places: lines and normal font
POVs : Bold
A/N: Bold + () [A/N on top and bottom of the chapter is separated by bold lines and some emojis if noticed.]
Speeches: ""
Thoughts: Italic
Flashbacks: Italic + bold lines
Thoughts in flashback: normal font
(Sometimes) small flashback: italic, no separating lines
                            Important quotes or speeches that represents extreme anger: Bold and underline if it's very important, like, the most important of the importance. Idk what I'm saying rn 😅.
Sounds: Italic
That's all for now!
————————•////•———————
In a gloomy classroom, all of the students are silent, their face hidden by bangs of hair.
The scene changed, to the blue blue sky. Something was traveling at a high speed. The sky seemed to rotate, and the thing stopped at an old-fashioned school.
A greenette was looking at the window, peering outside. A bluenette gulped, eyes filled with nervousness and a bit of terror.
Squish squish
Something squishy hit the floor. Tentacles could be seen moving to the direction of a classroom. A classroom named 3-E.
Inside, every student tensed up, tension filled the already-gloomy classroom. Some gulped nervously, and others waiting in silence. Waiting for the owner of the tentacles to reach them and come into the classroom.
  The creature came in. And with a smile permanently plastered on his face, he said: "Let's start our class, shall we?"
With the roll book in one of his tentacles, he looked at the class: "Student on duty, on your command"
The bluenette with pigtails named Shiota Nagisa stood up, and prepared his weapon: "Kiritsu! Kyosukete. Rei!" (Stand up! Attention. Bow!) And everyone started shooting.
"Good morning! Fire all you like - I'll just be taking attendance." The creature answered casually while dodging thousands of bullets flying his way with his inhumane speed.
"Isogai-kun "
"Here"
"I'm sorry, you'll have to speak up with all those gunfire."
"HERE!"
"Okajima-kun" "HERE!"
"Okuda-san" "Here!"
"Kataoka-san" "Here!"
"Kayano-san" "Here!"
"Kanzaki-san" "Here!"
—————————————————————
After the roll-call, every students were tired. "Alright. No tardies, excellent! Teacher is so happy!" He closed the roll book and exclaimed cheerfully as his face turned red with a ⭕️ on it, and correct bell sound could be heard in the back ground.
"He's so fast." a blonde female student said, nearly pouted.
"So the whole class shooting doesn't work?" Said a black-haired male, his golden eyes looked at their teacher disappointedly.
Nagisa's POV
I thought as I looked at my rifle.
We... are assassins.
And our target... is our sensei.
I then turned my gaze to our octopus teacher.
He was pointing at us: "Too bad. Not a single bullet hit it's mark today, either. Methods that rely on sheer number lack any individual thought. Line of sight, barrel position, finger movement—" He said matter-of-factly with his tentacle pointed upward. "Each of these is far too simple. You've got to be more inventive!"
"Otherwise," he stopped his pointing "you will never be able to kill me with my max speed of Mach 20"
(Short A/N: for anyone who doesn't know, Mach 1 is the speed of sound, so his speed is 20x speed of sound, which is 6860m/sec)
"But, like, see..." An orange-haired student who was standing in front of me, Maehara, pointed his finger accusingly at the teacher "No way did you seriously dodge all of the bullets!"
Tomohito Sugino, a dark-blue-haired male who was behind me, continued his sentence, "I mean, these are just BBs. You coulda just stood there grittin' your teeth as they hit you." He stared questioningly at the small round pinkish bullet in his hand.
"Yeah, that's right!" synchronized the class.
"Hmm" our teacher looked at the class, then reached his two-fingered tentacle to the nearest student, a brunette named Toka Yada."Gather up all the BBs and hand them over."
He grabbed the gun she had given him and raised another tentacle,then pointed the gun at it. "I've told you: these maybe harmless to you..." He then clicked the gun.
Bam!
And the part of the other tentacle was blown out of his body. All the students gasped, surprised.
The remains on his body and the blown out part, now laying on the floor, spilled out yellow liquid and shook violently. "...but they are special anti-me BBs developed by the government. If one hits me, it can slice my cells like they are tofu." The class stared horribly at the tentacle on the floor still shaking.
Our teacher looked at the remaining part, "Of course, they can regenerate a few seconds later." The remaining stopped shaking and pop! Another tentacle was there like nothing has happened. That tentacle then pointed at the class. "Then again, you could end up shooting your eyes out. So no shooting in the classroom unless you're trying to kill me!" Green stripes appeared on his face and he grins wider is it's possible "I do hope that you can kill me— before graduation, that is" He challenged with a smug voice.
"Now then, let's clear out all the guns and BBs and start our work!"
Class 3-E of Kunugigaoka Junior High School: the assassination classroom. Another day, another class bell rings.
—————————————————————
Our teacher wrote the remaining letters of a question on the board. "Now here's the question. Isogai-kun."
"Y-yes, sir"
"Which of these four tentacles is not like the other?" Inside his clothes there came four tentacles out of his sleeves: one white, one blue, one green, and the other pink.
"Um, the blue one?" Isogai answered nervously.
"Correct!" His face turned red with a ⭕️ again, his tentacles changed into his normal yellow ones, and he raised all of his tentacles above his head to show that it is correct. "Only the 'who' in the blue sentence is the relative pronoun. A relative pronoun qualifies the noun right before it, so here—"
"Psst, Nagisa!" Kayano Kaede, a girl with green hair tied into pigtails like me, caught my attention."The crescent moon is out, even though it's daytime."
"—'who is standing over there' is describing 'boy' over here." Our teacher was saying in the background.
How did we end up like this?
I thought as I looked at the crescent moon outside.
Two things happened at once as our third year began.
———————Flashback——————
The scene changed. The moon shown something black at the core, and suddenly, after releasing a powerful wave, it exploded with a bright light. A beautiful display of power.
The first was the moon suddenly exploding into a crescent.
Every screen in Japan switched to the news. The title was: "Breaking" "NASA reporting: Most of Moon Missing?"
"We interrupt this program to bring you breaking news" A news reporter said.
With the title of "NASA (National Aeronautics and Space Administration) Reporting: 70% Moon Vaporized", another reporter continued: "We have gotten word that about 70% of the moon has been vaporized into nothing. I repeat..."
Another ended the report in fear: "Will we only have the crescent moon to look at for the rest of our life?"
And the second was this:
"How do you do?" A yellow octopus alien (?) asked. "I'm the one who blasted your moon." Our class was dumbfounded. "Eh?"
The octopus (?) wavered his tentacles. "I plan to do the same to the Earth next year. Now I'm your teacher. Nice to meet you." Our class literally mental face-palmed. "There's at least six things wrong with this picture!" The feeling was unanimous.
The serious-looking man next to him introduced himself: "I'm Karasuma from the Ministry of Defense. First, please understand that what I'm about to say is a state secret." He sighed. "Let me be blunt: I want you to kill this creature."
A blond haired male, Mimura Koki, asked: "Um... What is that?" He pointed to the creature. "Is that the alien or whatever that came to attack us?"
The yellow octopus (?) immediately shot back "How rude! I'll have you know I was born and raised on Earth!" I thought: He was?
"I'm afraid we can't discuss the details, but he's telling the truth." Karasuma backed him up. "Come March next year, this creature who smashed the moon will destroy Earth as well. Only the world's leaders know about this. If news of this guy gets out there, we'd be looking at a global panic. You've got to kill him in secret before that happens. In other words..." He pulled out a green knife from his inner pocket and swiped it at the creature. "...an assassination." The yellow guy dodged it easily. "But this guy..." Karasuma continued his attempt of killing the other, he dodged, "...is very fast! You tried to kill him..." he continued swiping and the other kept dodging, and groomed his eyebrows from behind "... and he ends up grooming your eyebrows instead— immaculately!" A comical tick mark appeared on Karasuma's head, while the other's showed a this-look-good-on-you face for a mere second. They continued the killing and dodging, "this superbeing has the power to turn a full moon to a crescent. His speed tops out at Mach 20! In short, if he gets away, we'll be left helpless, awaiting our destruction." Karasuma explained. "And that's no fun!" The other exclaimed, closing his grooming toolset. "So I made your government an offer: no killing me." A bigger tick mark appeared on Karasuma's face. "Instead, I'll teach at class 3-E of Kunugigaoka Junior High School."
   What? Why? I thought. I didn't think I understand this. I still didn't.
  "We don't know what he's after. But we have no choice but to agree, on condition that he doesn't harm any of you students. We have two reasons for this. First and foremost, if he's coming to a classroom everyday to teach, we can keep an eye on him. And second, it gives thirty people the opportunity to kill him from extremely close range."
——————Flashback ends——————
Third person's POV
  Bam! Nakamura Rio, a blonde, had just fire her gun at the back of the octopus teacher.
  Clap! He caught the anti-sensei BB with two pieces of chalk.
  "Nakamura-san." His face became red and angry steams constantly going from it.
   "Didn't I tell you not to let assassination interfere with your studies?!" He pointed at the BB between the chalks and glared at the student who was standing with her gun on one hand.
  "Sorry." She dropped her hand with the gun down and put her other hand on her head in an apologizing manner, but her tone didn't sound like apologizing at all. "Stand at the back of the class for the rest of this lesson and think about what you've done!" He put one tentacle on his hip and the other pointing at Nakamura, in a scolding manner.
  "How could you make this creature our teacher?" "And why are you making us assassinate him?" Nagisa recalled while holding his pen boringly. All of these cries faded as one final condition was announced.
————————Flashback———————
"Your success will be rewarded with ten billion yen." Karasuma announced. "Hah!" The class became wide-eyed and their jaw dropped as they stared at him in disbelief. "It's only fair. If you can assassinate him, you will literally save the Earth." The serious man explained. "Fortunately, he doesn't think much of you." Those words were directed at the yellow octopus who was wavering his tentacles with weird green stripes on his face. "See? The green stripes means that he's looking down on you!"
     What is he, a chameleon?! One of the males in the class thought.
  "Of course I am!" The yellow guy answered. (I seriously thought he can read the student's thought and he answered it for nearly five seconds 😂) "If the government can't kill me, how could you? Even when they sent their very newest fighter jet after me,..."
—Small flashback inside flashback—
A new fighter jet was chasing its target. A large yellow flying octopus. The target was within shooting range. The computer system could be sure of that. Suddenly, the octopus slowed down and the jet lost sight of its target.
———Small flashback ends———
"... all it got was a good waxing in midair!" He said gleefully as he remembered that time when he cleaned the jet.
  What's with all the grooming? One female in the class thought.
  "So while this guy looks down on you, your job is to find an opening in his defense and strike it. We'll  provide you with weapons and ammo that won't hurt human but will work on him." That were the rails of rifles, guns and knives his assistants were holding. "You must keep this absolutely secret from your family and friends. There isn't any time left. If  the Earth is destroyed, we'll have nowhere left to run."
  "And that's about it. Well then, I hope you'll make the most of your one remaining year."  The yellow octopus, now our home room teacher, said as he clasp his two-fingered tentacles together.
—————— Flashback end——————
We only have one year.
If we can't assassinate him by then, the Earth will be history.
The school bell rang.
  "Ah, lunchtime!" Our homeroom teacher exclaimed, looking at the school bell.
He turned to the window, and opened it. "I'll just pop over to China for some mapo tofu." He seemed to remember something. "Ah, if anyone would like to try and assassinate me, just call me on my cell." With that, he disappeared with a strong push, leaving lots of smoke, dust, and students shielding their faces behind.
  Kataoka Meg, the one who sat closest to the window he had flown from, put her index finger to her chin: "Uh, let's see... if he's traveling at Mach 20... it will take ten minutes to get to Sichuan, the home of mapo tofu." Isogai replied, "Guess no missile could shoot that down. Heck, that octopus even grades tests while breaking the sound barrier!" Everyone pictured the yellow guy doing it in midair. "Seriously!?"
  Isogai remembered the time he received his English test. There were a lot of "double octopus!" and "perfect answer!", plus some drawings, "He even did a little drawing on mine."
  "Isn't he actually a pretty good teacher, though?" Rio asked.
  Kurahashi Hinano, an orange-haired student, gave her opinion, "He is! I aced the math test thanks to his after-school tutoring!" That refers to his accompanying her to study, both keep their smile on their face although Hinano raised her knife in attempt to kill him and the teacher give out another tentacle to hold her back.
  "Yeah, but..." Koki said darkly, "we are the E class." Okajima Taiga sighed, putting his hands behind his head, "Tryin' our best won't do much."
Yeah, Nagisa thought while looking at them, he might be an octopoid superbeing - not to mention our target - but... He returned his gaze to his notebook on the desk, for whatever reason, he's still teaching us like any other teachers would. Likewise, we're perfectly normal students outside of the whole killer thing, but E class is a bit different from the rest.
  "Oi Nagisa," Ryoma Terasaka, a bulky boy, called him, "come with us." By 'us' he meant Muramatsu Takoya and Yoshida Taisei, is companion, behind him. "Is time to put our assassination time in action." Nagisa only nodded.
———————Outside———————
  "That octopus's face changes color according to his mood, right?" Terasaka asked him with an interested smirk. "Did you note down all the variations like I asked?"
  "More or less," Nagisa answered him, "it's striped green when he's confident, like we all know. When we give an incorrect answer, it's purple. A correct answer makes him go scarlet. But what's really interesting is after lunch, when—"
  "I don't need to know all that." Terasaka interrupted him, which made him surprised. "I have a plan," he went down from his seat on the stairs and raised the rubber anti-sensei knife and pointed it at Nagisa's face, "at the moment when he least expects it, you are going to carry it out." Nagisa looked surprised (again), "m-me? But..." "Don't be such a goody." Terasaka retreated the knife and inched his face close to Nagisa which made him cowered a little. A vein popped on his scornful face. "We are the E class—" he inched closer and Nagisa cowered some more, not looking at his face. "— the rejects that failed to keep up at this famous prep school. They call us... the End class. Everyday, they sent us to this isolated mountaintop campus, and discriminate against us in every way like we're scum." He put his arm on Nagisa's shoulder, the other still not looking at him, and smirked. "You think us losers are ever gonna get another chance to score a cool ten billion yen?" He pulled Nagisa closer. "We're gonna climb our way out of this shithole (pardon the cursing!)..." he pulled out a small orange knot bag, "anyway we can." He dropped it on the other's hands, and walk away with his companions, the other two snickered. "Just don't screw up," Terasaka called, "Nagisa-kun." He left, leaving Nagisa staring at the knot bag given to him.
———————Flashback———————
"I heard that Nagisa's headed for E class."
  "Ooh, that's it for him."
  "I'd better delete him from my address book."
  "Same. I don't want anybody to think I'm on his level!"
Person after person, leaving him staring at the class change notice on his desk.
——————Flashback ends——————
Whoosh!
Nagisa turned back, quickly hid the knot bag behind him.
"I'm back!" The yellow octopoid superbeing announced as he arrived with lots of smoke and dusts. Nagisa awkwardly welcomed him while putting one hand to shield his face, "H-Hello, sir. What's with the missile?" He referred to the missile on the teacher's shoulder with one tentacle holding it. "A souvenir." He simply shrugged. "The Self-Defense Force ambushed me over the Sea of Japan." Nagisa sweat dropped. "I-It must me tough, having everyone after your life." "Not at all!" He opposed, raising one of his tentacle finger, "you know you are truly powerful when everyone has it in for you." He put his two fingers on his chest proudly.
  Something clicked inside Nagisa's mind.
   "Now I do believe it's time for the fifth period." He said, and walked away.
  "Yes, sir." Nagisa quietly replied, his head hung low, sadness clearly traced in his sky blue eyes. He doesn't understand. If you are someone's assassination target, that means they all acknowledged your power. A creature like that wouldn't understand what it's like... for no one to expect or fear anything from you, or even acknowledged your existence...
———————Flashback———————
"Thanks to you, my evaluation's in the gutter! The only silver lining is I'll never have to see you again." His homeroom teacher said, smiling at the last part.
——————Flashback ends——————
   His grip on the small knot bag string tightened. I might just be able to kill him. After all, this teacher can't see me, either.
——————————————————————
"Alright, then, compose a short haiku (a kind of Japanese poem) to go along with our theme." The teacher said cheerfully. "The final line should be 'was tentacles all along.'"
"Huh?" This earned surprise from the students.
  "'Was tentacles all along'?" Kanzaki Yukiko, a black haired student, asked.
  "Indeed! When you are finished, bring them to me." He replied instantly. "I'll be looking for proper grammar, and whether you aptly conveyed the tentacle's beauty."
  "For example:
Not the storm of garden's snow
Or flowers moving on,
But sprouting there instead
Was tentacles all along."
(Interpretation: A life lived vividly, powerfully, wasn't a blossom shower scattering cherry petals in the garden—
It was tentacles.)
   "We have to write it was tentacles? Really?" Isogai face palmed. Literally.
  "Once you're done, you're free to go home!" Teacher announced happily, that earned a groan from the students. "How are we gonna write about that?" Hinano asked, question in her voice. "Now now..." the octopoid teacher was still in his cheerful mode, with tentacles waving here and there, "aren't any marvelously slithery phases coming to mind?" He waved his tentacles excitedly. "ぬるぬる塗るぬるぬる ぬるぬるぬるぬるぬるぬるぬるぬるぬるぬるぬるぬるぬるー！" (Nuru nuru nuru nuru.... aka Slither slither slither slither!) (I actually counted, he said nuru 15 times, that was a lot- oh and he would have kept saying it if it wasn't cut off—)
"Enough with the slithering!" Maehara interrupted him, annoyed. The teacher turned pink.
"I have a question!" Kaede raised her hand. The pink teacher was back to yellow and turned to her. "Yes, Kayano-san?" "It feels weird to only ask this now but... what's your name?" She fired off her question. "Huh?" "How are we supposed to refer to you specifically?" The yellow teacher stood still, his voice seemed surprised. "My...name?"
"Now you mentioned it..." Isogai turned sideways. "He never did tell us." Fuwa Yuzuki, a short-purple-haired female, finished his question.
"Hmm... I don't have the kind of name you tell people." The yellow octopoid superbeing scratched his head sheepishly. "Go ahead and give me one." Maehara sweat dropped, "you sure about that?" The other stopped scratching, "but right now, focus on your schoolwork." "Yes, sir." Kaede gave him a sweet close-eye smile.
"Meanwhile, I'll just take a little break." The teacher turned pink again. Nagisa noticed this.
He then lowered his head, bangs covering his face. And he stood up. "Oh, finished already, Nagisa-kun?" The pink teacher asked, relaxed. Terasaka grinned gleefully. Kaede widened her eyes. She saw Nagisa holding a knife, behind the paper. He was walking, slowly, to the teacher.
After lunch, right around the time we get sleepy, his face sometimes go bright pink. Nagisa thought while walking towards the teacher. He was a little slow responding to Kayano's question, too. That might be when he's at his most vulnerable. His eyes burned with determination. We prep school failures are always thinking, "we gotta get back at 'em somehow. We'll show our parents, friends, and teachers that we can do it if we try." We can do it if we try. He was in front of his teacher.
He pulled out the rubber knife, and swing it. The teacher, as expected, raised a tentacle and held his arm and another taking the rubber knife out with a handkerchief. "Didn't I tell you to be more inventive?"
We have to prove ourselves....
He hugged the teacher, who's out of his pink mode and turned to yellow.
....by any means necessary.
He put his arm around the teacher's neck, and smiled warmly. On his neck, pressed between them, was a grenade.
Terasaka pressed the button.
Bam!!!
A very bright explosion happened, BBs are everywhere, and both Nagisa and the teacher was nowhere to be seen. All the class was shielding their faces, some of them let out a scream of horror and shut their eyes. "Hell yeah!" Terasaka shouted, his voice could be heard between the screams and the sounds of flying ball bullets. He raised his hands in the air in a victory manner. "We did it!" Takoya cheered with him. "Ten billion yen! Cha-ching!"
"Nagisa!" Kaede covered her mouth, already recovered from the blast of BBs.
"Serves you right!" Terasaka and his gang were jumping around the class in their own victory while some other students cared about Nagisa's well-being.
"What have you done?!" Maehara glared at them, and shouted.
"Hehe! Bet he never expected a suicide bomber!" Terasaka looked down at what seemed like their teacher's corpse.
"Hey! What'd you give Nagisa?!" Kaede stood up from her seat and questioned them in a demanding and raging tone. "Huh? A toy grenade." Terasaka answered casually, standing up from the corpse, like it was just a normal thing between friends. "But I beefed it up with gunpowder... so it'd shoot three hundred anti-sensei bullets with crazy speed!" Kaede gasped. "Nothin' strong enough to kill human beings, all right?" Terasaka assured her like it was about the weather. He sat down again. "My ten billion yen will cover his medical bills no prob— Huh?"
Nagisa was unconscious, but other than that, he didn't seem to be suffering from injuries. And he was covered by some transparent yellow membrane. "He's not hurt? Not a single burn?" Terasaka lifted the yellow membrane. "And what's with this membrane? It's attached to that octopus's corpse?" He was cut off.
"As it happens," a voice said from above, "I shed my skin about once a month. I protected Nagisa-kun there by covering him with my old skin." As he said, Nagisa sat up holding his head, breaking the membrane in the process. He seemed surprised as there was something strange around him. Terasaka looked up. And saw him.
He was on the ceiling. His eyes glowed bright red. His permanent smiley face just made it creepier. "It's my once-monthly ace-in-the-hole." He said in a dark low tone that sent shivers down their spine. And the aura around him, is menacing. "Terasaka,
Yoshida, Muramatsu." The three mentioned had the face of horror.
You don't have to look at the color of his face to know. His menacing aura surrounded the bright classroom and made it go dark. Every students were shivering, but not from the cold. Some even let out whimpers. Nagisa stared at him as his eyes stretched out, his mouth opened to reveal sharp teeth. His face was stretching tight and muscles were seen. Pitch black! He's furious!
"You three... are responsible for this, aren't you?" He asked, his voice dangerously low. The three mentioned were now displaying their worst horror face possible. Sweats were streaming from their faces. "N-no" "I-It was all Nagisa's idea!" They managed to blurt out accusations and denials. The teacher then come outside, around the city, with his Mach 20 speed to search for something.
"H-he's gone!" Just as they said that, he came back, and threw three nameplates on a desk. After they recovered from the smoke, they looked at the nameplates. "The nameplates from our houses?!" "My agreement with your government prohibits me from harming you." There are other students' nameplates in his arm-like tentacles, and he raised one of them, the one that wrote "Shiota". "But if you tried another assassination like that one... I can't guarantee the other's safety." He dropped them all down, "your family, your friends.... maybe I'll kill everyone on the planet except you." The class was silent. But the silence was horrific.
It only took five seconds for everyone to understand. Nowhere on this planet was safe. Our only escape from this situation.... was to kill him!
"What's the deal anyway?!" Nagisa looked back. Terasaka was down right pointing at the teacher's face. "You're a pain in the ass!" (Again, pardon the swearing!) The class would miss him later. "Showing up all 'I'm going to blow up the Earth' and 'Assassinate me'! What's wrong with using an annoying method to kill an annoying bastard?!" Again, the class would probably miss him later....
Or not.
"Annoying? Hardly." The teacher was back to his normal self. He is even complimenting Terasaka with a scarlet face with a ⭕️ on it. The menacing aura, the pitch black face, sharp teeth,.... Everything vanished like it never happened. "Your idea itself was a very good one. Especially you, Nagisa-kun." He raised a tentacle and patted Nagisa, who is still not out of his shock state and was still sitting on the floor. He reluctantly accepted the pat. "The way you carried yourself so naturally on your approach gets full marks from me. You did an excellent job making it past my defenses. However!" The octopoid superbeing pointed his other tentacle finger towards Terasaka and his gang, who immediately flinched in fear. "None of you look out for Nagisa-kun—" they looked down in shame. "Not even Nagisa-kun himself. Students like that aren't fit to assassinate anyone." His face turned purple with a purple cross for a few seconds. He turned to the class. "We need an assassination worth smiling about— one to be proud of! You are all capable assassins who have that power within you. Just a few words of advice from your teacher-slash-target."
Nagisa touched his head. One moment we were being chewed out at Mach 20, the next we were being praised with waving tentacles. It wasn't your average education, but it made me very happy. All because this unusual teacher was actually willing to look us in the eye.
The teacher looked at Nagisa. And then at the burn on the desk. It made him remember.
"If you... if you are willing to give up your time, go teach those children."
  "What splendid tentacles. With hands like these, I'm sure you will be a splendid teacher."
"Let me pose you a question, Nagisa-kun." After putting his tentacle on to lessen the burn on the desk, he turned to Nagisa, then to the class. "I have not the slightest intention of being killed. I will enjoy my time with you all until next March, and then I'll blow up the Earth. If you don't like that idea, what do you plan to do about it?"
Nagisa looked surprised. We've never assassinated anyone before, and there's plenty of other stuffs we should be doing. But, you know... he clenched his hand. And the teacher looked at him expectantly. I think this teacher might even accept us trying to kill him. He gave his answer with a sincere smile.
"Before you destroy Earth, I'll kill you."
"Nurufufufufu, then what are you waiting for?" Green stripes appeared on the other's face. He then turned to the class, his tentacles waving freely, and he pointed his tentacle finger upward. "Once you've killed me, you're free to go home!"
"Ehhhh!" The class was dumbfounded. "Just like that, Huh?" Isogai groaned. "You know we can't kill you!"
Nagisa walked to his seat.
We are killers.
And our target...
Is sensei.
"Wipe, wipe, wipe it clean!" The teacher was cleaning a nameplate using a handkerchief.
If we tried to shoot him now... the whole class thought with an annoyed smirk, taking their guns and rifles out while their teacher was still continuing his own "wipe it clean" song. We'd just get polished like those nameplates. We're never getting out of here!
"An unkillable teacher..." Kaede thought. "殺せない (korosenai) for 'unkillable' and 先生 (sensei) for 'teacher'... Oh! What about 殺先生 (Koro-sensei)?" "Koro-sensei?" Nagisa, who was sitting next to her, asked out loud and that got the attention from the teacher.
So here we are with Koro-sensei...in our assassination classroom.
The bell signals the start of another school day.
———————————————————
Word count: 5079
So how was it?
This first chap is technically the first episode of the anime series. Well, I'm a manga reader too, but I think if I watch the anime it would be easier to imagine and write the chap. It's just my opinion thou, anyone who thinks different, I won't judge you guys.
I was planning to put Y/N in after the next chap, so heads up!
Also if there is any mistake or typos, don't be shy to comment, I'll fix it right away!

Finished on 16th August