Thanks again to all those who submitted OCs. Additionally, thanks to Eliphas-Chaos for the favorite, StrikingBlades Fryllabrille201 aliengirl13 KyrieEleisonElise and 2 for the follows and finally Pixie Nobara for doing both.

Disclaimer: I do not own Assassination Classroom

A.N: All narration and/or internal monologue will be done in italics

Third year had been going on for less than a month and two very crazy things had already happened. The first was that seventy percent of the moon was suddenly destroyed through unknown means. The second, which was arguably crazier was the fact that a strange smiling yellow octopus creature, who claimed to have caused said destruction wanted to become E-Class' homeroom teacher. With help from the government along with the promise of a huge reward the E-Class nobodies have to assassinate their teacher. In retrospect all of this sounds easy except for one small detail; the octopus can move at mock twenty.

When everyone first heard the news it was pretty hard to believe but after not only seeing a demonstration of the creature's abilities on a man from the Special Defense Force, Mr. Karasuma, but also his strange method of retaliation by grooming the students started to believe. Now the entire class was sitting in silence waiting for its teacher and to enact its latest plan to assassinate him. He slowly slithered in with that same fixed expression he always had with the roll book in his tentacles

"Alright people let's get started," he said happily. "Class monitor if you would do the honors."

"Right," Yoru responded, "ready…aim…fire."

Everyone drew their guns and unleashed a hail of BBs toward their teacher; however, it did not seem like they were hitting their mark. "Oh my, well I think I'll just call roll while you children where yourselves out." As he began to call roll all of us had to speak up so we could be heard over the gun fire. When he was done calling roll all the students were exhausted from all their gun firing, "Excellent everyone is accounted for, no one's tardy congratulations. No luck today too I'm afraid but what lesson did you learn today. Numbers are no substitute for inventiveness; that any hack can point a gun and pull a trigger? My guess is that some of you fall in column A and some in column B. I understand that you're trying to cast the net as widely as possible so to speak but the approach lacked originality. When the target clocks in a Mach twenty an assassin has to think out of the box."

"Mach twenty," Akihiro scoffs, "there is no way you dodged that hail of bullets."

"He's got a point," Asphar agrees, "these are just BBs right for all we know you could have just stood there and took them like a champ."

At this statement every student began muttering in disbelief which only made the creature that was their teacher sigh, "Collect the ammunition and bring it here please." He took a gun from one of the girls as he continued to explain. "As explained by your government these are no ordinary BBs; they are anti-me BBs. They are harmless to you but," Pulling the trigger, he caused one piece of one of his tentacles to be blasted onto the floor while the piece still attached to his body began to spew some sort of liquid "able to slice through my cells like a knife through warm tofu. Lucky for me I can regenerate after a few seconds." As he said that the piece that he shot off grew back in an instant. "however, that is not a luxury you all have if any of you accidently shot one of your eyes out. That being said the discharge of firearms in the classroom is now forbidden." Then his face changed from pure yellow to yellow with green stripes which signified that he was feeling superior, "and good luck killing me before graduation you're going to need it. Now all firearms and government official anti-me BBs away please time to get to work."

Everyone responded with a groan as the octopus began to teach them their grammar lesson. Since Yoru knew most of the lesson already he could afford to let his mind drift as he stared out the window.

This is all bull crap if he could dodge all those BBs without a single one of us hitting him how are we supposed to kill him. Not to mention he was able to avoid the attacks of that one guy from the Special Defense Force and he's a professional; I mean how does the government expect a bunch of junior high kids to do something their best can't. I don't even understand why the octopus would want to teach us anyway; I mean the government made it pretty clear why they would let him do this. He isn't allowed to hurt us and the government knows where he is a good portion of the day not only that but also he is in the line of fire of a lot of people with plenty of incentive to kill him. I mean if it wasn't for the serious cash the government was offering I'm sure most of the class would be gone already. The only catch on our end is that we can't tell anyone about any of this which is easy for me. Everyone's motives for being here were all clear except for his. Most of society has already given up on us so what makes him so different?

Yoru's thoughts were cut short by the sound of gun fire. Turning back toward the front, he saw the teacher with a book that had a BB in between its pages. He turned toward the back to see one of the girls, Watanabe Yuki, with a drawn pistol and a surprised look on her face.

"Watanabe, I distinctly remember saying no discharging of firearms in the classroom," the teacher scolded.

"I know," she admitted turning her head to the floor.

"Back row young lady think about what you've done." After a while the lunch bell rang and the octopus opened the window. "That's the lunch bell boys and girls so if you don't mind I'll be popping over to China for a quick bite. You all have my cell number so if any would be assassin is feeling particularly trigger happy today are welcome to hit me up." In the next instant he was gone.

"Okay, someone do the math. If he's heading for China at Mach twenty…" Watanabe began.

"It'll take him about ten minutes to get to his favorite takeout place and back," Yoru said finishing her sentence.

"So just to be clear we've absolutely ruled out missiles?" Akihiro asked.

"Are you crazy? Even if we had access to that kind of tech he can break the sound barrier while grading," Jun told him making sure to put emphasis on the last part

While the entire class was talking Yoru was busy staring out the window amazed at how a few seconds ago the teacher was right there.

Even though I hate to admit it despite how crazy and powerful the octopus is he is one hell of a teacher. He's already tutored some of us on our weaker subjects and most of us have already started pulling our grades up. It's a shame though considering the world only has one year left but then again none of us had much of a future to begin with. To an outsider looking in we're just normal third years but underneath the surface we're a whole lot more.

This time it was someone saying his name that brought the boy out of his thoughts, "Hey Yoru come with me; I need to talk to you," Yuuki commanded. The girl led Yoru outside to the backstairs of the old campus building to talk. "So have you been keeping track of the different colors the octopus' face turns like I asked?"

"Yeah I have. Green stripes mean he's feeling cocky, orange with a circle means you gave a correct answer, purple with an X means you gave an incorrect answer and…"

"You can stop right there I think I have enough information. Once the octopus' guard is down I'll make my move or rather you will."

"Okay, and why should I be the one to do your dirty work?"

"Tell you what, if you do this for me I'll owe you one and you can make me do anything you want no questions asked. That sound good enough to you?"

"Fine, just remember no take backs. So what exactly is your plan anyway and what do I have to do?"

She took out a small draw string pouch and placed it into his hands, "Go up to him with this and I'll take care of the rest, just don't blow it." She walked back into the building without another word.

Before Yoru had a chance to think about it he heard a big boom and the next thing that he knew the octopus was standing next to him with a missile in his tentacles, "Hello there, I'm back."

"Um okay, hello sir. If you don't mind me asking what's with the missile?"

"Oh it's just a present from a strike force that tried to bring me down over the Sea of Japan," the creature answered.

"Wow, it must suck living your life in the cross hairs?"

"Quite the opposite actually, it just reminds me how amazing I am. Now then inside for fifth period please," he said slithering past Yoru who was deep in his own thought.

There's no doubt about it he amazing, capable and strong enough to make people stand up and take notice no matter who they are. He's everything I pretend to be and no matter how much I try I'll never good enough like him. To him I'm invisible just another nobody and I'll use that to my advantage.

When fifth period started the octopus gave a very imaginative assignment, "Your assignment this afternoon is to write a short poem that's final line reads was tentacles all along." He was met with groans of disbelief even after he gave his example. "You will all be graded on use of language, creativity, grammar, and over all beauty expression. Once completed please present it to me and you can go home for the day."

"Um sir I have a question," Nikko said.

"Of course what is it Mr Azayaka?" asked the teacher.

"Well do we always have to call you sir? You never gave us your name and we kind of need one. I mean it would be pretty awkward for us to not call you anything."

"Hmm, trouble is I don't have the kind of name you just give to people. Why not pick one for me?" The sarcastic thought of what could possibly go wrong went through every student's mind. "Just focus on leader and syntax."

"Okay," he responded cheerfully.

"I'll just take a short break while you all take up your pens," the teacher said before his whole body turned pink. At that moment Yoru stood up and began walking toward him. "It seems that the muse favors Yoru."

Every day after lunch he gets sleepy that what the pink means and thanks to Nikko question he was thrown off. The conditions are all perfect to strike now. Every person in this class knows how to go unnoticed it's what we do and every adult we know is always telling us to apply ourselves so…"

He took the knife that he was hiding behind his papers and tried to stab the teacher with it but Yoru was quickly stopped. "What did I say about thinking outside the box?" In the next instant Yoru fell onto him and wrapped his arms around him as if he was giving the octopus a hug. Additionally, thanks to the papers concealing it as well; the teacher did not notice the grenade around Yoru's neck.

I'll apply myself at trying to kill him.

The next instant Yuuki pushed a button on a remote and the grenade detonated. BBs and smoke were spread forcefully though out the classroom while everyone was screaming. Yuuki was the only one still calm and she simply walked up to the blast zone. "I can't believe that actually worked."

"You bitch, what did you make him do?" Asphar screamed.

"I just gave him a modified toy grenade with those government official BBs and just enough gun powder so they could scatter at a high enough speed. It shouldn't have been able to kill him," she stated plainly. "If it'll make you feel better I'll help pay for his medical bill after all I did say I'd owe him one." It was then that the girl noticed Yoru without a scratch on him covered in a strange membrane. "What is this did the body…"

"It's not a body," the octopus interrupted. "It's a husk. I shed my skin once a month; I wrapped it around your classmate to shield him from the blast." It was then that everyone noticed the teacher who was on the ceiling and despite his ever present smile he did not look happy. "I'm going to go out on a limb here and assume you didn't see this coming. Yuuki Shiro," The usually yellow octopus was now black and his wide smile was now gone and replaced with jagged teeth. "this was your doing wasn't it."

"Maybe," she responded hesitantly.

The octopus was gone in a flash and when he returned he had the name plates of everyone from their respective houses. "Here's the deal kiddos. The agreement I have with your government forbids me from harming you but there's a catch. If you ever pull another irresponsible stunt like that again there's nothing saying I can't harm someone else. Family, friends everyone in the world except for you if I feel like it."

It all dawned on us then and there that this was not going to be easy. We can't run we can't hide we can't go unnoticed here. We just have to kill him.

"Go ahead and make threats," Yuuki screamed still scared out of her mind. "I'm not afraid of you; where do you get off blowing up the moon. We all have rights to you know. You can call me irresponsible I'm just defending myself."

"Of course I know that," the teacher assured them while returning to his normal self. "I'm not calling you irresponsible for trying to kill me. No, in fact Yoru gets full marks for technique his composure was outstanding; however, you didn't care if he was injured not even he himself did. Students with that attitude aren't fit to assassinate anyone. You must believe yourself worthy of your target that means you must take pride in what you do who you are and in each other. All of you are more than the sum of your parts."

Even after all of that trying to kill him and him making that threat he still tries to teach us all a lesson. No doubt about it this is not a normal education but it's actually starting to grow on me. It's kind of nice not to be ignored for once.

"Here is a question for you Yoru given that I have no intention of being killed but I do want to enjoy every moment we have together before the planet goes boom. What are you going to do about it?"

"Well I don't really have that many options but don't worry sir you'll find that I can do plenty," he responded.

At this he just laughed as his face now had green stripes, "That's the spirit. No one leaves until I'm vanquished."

Yup we're assassins now and our target is our teacher.

"How do you say un-killable in Japanese," Nikko asked Yoru when he got to his seat next to him. "Korosenai, how about Koro Sensei" At this the octopus looked up in approval.

Well I guess now, it's just us and Koro Sensei

As everyone was walking out at the end of the day Yoru went up to Yuuki and stopped her. "Don't forget you owe me one and I always collect."

This is the longest thing I've written to date and I want to know what you guys think. I'm going to follow the anime but I'm also going to put some original chapters in this fic to develop the OCs. Speaking of which I'm still accepting OCs and I would love the opinions of the OC submitters in regards to how I handled theirs so far. With all that said I'll catch you guys later