Karma's Sister. (Itona x Reader)

Chapter 1

*Introduction* 

Karma Akabane. One of the strongest kids in E-Class. Nobody dared to mess with him or his little sister, Y/N Akabane. She might even be stronger than Karma. 

Both in End-Class, the siblings have the same goal. Kill Koro-Sensei, their teacher. In fact, their whole class was trying to assassinate him. 

Koro-Sensei is a genetically modified superbeing who looks like a giant yellow octopus. A few months prior to becoming E-Class' homeroom teacher, he had destroyed over half the moon. He said he would do the same thing to the Earth in March of the next year unless someone assassinated him by then. 

Only one problem. Normal weapons have no affect on Koro-Sensei, AND he moves at mach-20. Talk about speed. 🙄 

The government  has been trying to keep Koro-Sensei a secret from the world. Not everyone needs to know there's a superbeing capable of destroying the earth right now if he wanted to. When Koro-Sensei said he wanted to teach E-Class, the government only allowed it on one condition. He had to teach them how to assassinate him. 

By the time Koro-Sensei was their new teacher, the government had already come up with special knives, bullets, etc that could kill him. The material was called Anti-Sensei material. E-Class' other teachers, Tadaomi Kurasuma and Irina Jelavić are also trianed assassins. 

All of E-Class are now assassins in training. They're very skilled, too. So far the strongest ones are Nagisa, Karma, and Y/N. They were confident they were close to killing Koro-Sensei. Little did they know, the government is about to send in a new student, who is also another trained assassin, that will change everything. 

*End of introduction* 

*Y/N POV*

We had just gotten to class when Koro-Sensei announced that we were getting a new student. "Great." I thought. "If they would just stop sending in other people then we might actually be able to kill this bastard." 

Just then, Ritsu, our AI classmate powered on. Some kid asked her about the new student but I wasn't paying attention. I was staring out he window looking at the rain, spacing off. 

I was knocked out of my trance when the classroom door suddenly slid open. A man about 5'2 stood in the doorway looking around the room. He was dressed in all white and had his face covered. 

Koro-Sensei was up in a corner in his liquid form, I guess he really was scared. Was what Ritsu said actually that scary? 

"S-So.... are you the new student..?" someone asked from the other side of the room. 

I heard something behind me so I got up from my seat in the back of the class adn walked over to Koro-Sensei's podium, leaning my arm on it. 

"No, he isn't. The new student is gonna burst through that wall," I pointed at the section of the wall right behind my desk, "in three... two... one-" 

And as if he heard me, the new student burst through the wall right behind my desk right when I said "One". If I hadn't got up I would've been hit with debris. He sat down at an empty desk next to mine. 

"Class 3-E, also known as End-Class, I'd like you to meet Itona Horibe, you can just call him Itona." The man in white spoke.  "I am his caretaker, you may call me Shiro."

The class just ignored Shiro and looked at me, wide-eyed. 

"Woah, Y/N how did you know he was going to do that??" Nagisa asked me. But before I could answer, Itona spoke. 

"I've won. I have proven myself stronger than the classroom wall."

I walked over to him and put my hands on the desk. 

"That's great buddy, good job," I rolled my eyes. "but use the goddamn door next time, 'kay?" 

"You're the strongest one in this class aren't you?" He patted my head. "Don't worry though, you aren't stronger than me, I only fight people who are." He said and looked at Koro-Sensei. 

He got up from his seat and walked over to where Koro-Sensi was standing but before he could say anything Karma interrupted. 

"Y/N? The strongest person in this class? You've gotta be deranged, kid, my little sister is far from the strongest. Ignoring that for now, though. You came in through the wall, right? You clearly don't have an umbrella and it's pouting buckets out there. So how come there isn't a drop of water on you?" 

Itona didn't reply. Now that I think about it, Karma's right. Its raining a lot out there and there isn't a single drop on him or Shiro. 

Itona looked at Karma.

"She's not the strongest, huh? One look at her and you can tell she has the greatest potential in here to be a really skilled assassin. More than you." he said, "Do you really think so little of your sister that you pay no attention to her? Sure, you're strong, but she's much stronger than you. I don't know you but you sound like a bad brother saying she's far from the strongest. If anything, it makes you the one furthest from being the strongest. I know that if I were her brother, I'd encourage her to keep honing her abilities instead of saying she isn't strong." He finished, leaving everyone, including Koro-Sensei and Shiro wide-eyed and shocked beyond belief. 

 "Now, as I was about to say before Karma so rudely interrupted. Koro-Snesei. You are the very strongest one in this class. I will prove I am stronger than you. I've honed in on all your weaknesses and I know how to kill you. Let's keep it fair, alright? After all, brothers gotta keep things straight forward, no tricks, right? Big. Bro." He said as he took a bite of chocolate that none of us knew he had. 

"WHAT?!?!?!" the whole class yelled in unison. 

"Koro-Sensei. Explain." I said. He looked nervous, sweaty, and like he knew just as much as we did about this. "How is this guy your brother??" I asked. 

"But.. Itona's a human and Koro-Sensei's a...." Kayano said, trailing off, not knowing what to call Koro-Sensei. We all looked at Itona, who was now walking over to Shiro, half expecting him to tell us something but instead he and Shiro just walked away. 

Koro-Sensei didn't have an answer for us so instead he started walking towards the door and said, "Class dismissed." 

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That's it for the first chapter. Hope you liked it. I'm not sure when i'll get to update again so don't hold your breath waiting for a new chapter lol. 

Word count: !100