Wait... Let me get this straight. Kayano has tentacles, isn't actually called Kayano Kaede and Koro-sensei killed her sister? Welp, that's a lot to dump on me at once.
"Koro-sensei... She called you a murderer. What... What happened in your past? No more dodging the question." I said quietly, clenching my fists.
"I'll tell you... But only when the whole class is here." Koro-sensei said. And so, we went to retrieve Kayano.
I stood in the large grassy field next to Karma. I squeezed his hand tightly. Kayano was a close friend. Was that really all an act?
We tried to talk her out of it and help her, but she only refused. The tentacles that were lashing around her were soon on fire. I watched in awe as she mercilessly attacked Koro-sensei. She's a brilliant fighter and she has very good kinetic vision. I couldn't watch this anymore. I nuzzled my head into Karma's shoulder, refusing to look forward. I heard everyone gasp and looked forward for a second. Koro-sensei was holding Kayano back as Nagisa... Kissed her. Wow, didn't know he had it in him. Koro-sensei removed the tentacles and she went limp. He collapsed to the floor, it's not surprising; he did take a hard hit to the heart. A bullet was shot at him from a nearby hill. We all looked over and saw Shiro with a strange man in entirely black next to him. Shiro parted his robes, revealing his face. Koro-sensei looked slightly troubled by the guy's identity. They must know each other somehow...
"Guys, she's waking up!" I looked over at Kayano, seeing her get up groggily. I hope she's okay.
"Please tell us. No matter how bad your past is... As long as it's the truth, we can take it." I heard Isogai say.
"It seems I have no choice. Your trust is most important to me. Up until two years ago..." he seemed to take a deep breath, he glanced nervously towards me before looking back forward. "I was the master assassin know as the Reaper."
I fell to my knees. Right then and there. My mouth was agape, eyes wide in shock. What did he just say?!?!
"Brother..." I whispered out, looking up. I felt Karma hoist me up and let my head against his chest.
"Even if nobody manages to kill me, I will die inevitably this coming March. In other words, the ever-changing future that rests on this assassination... Is whether just one person dies, or the entire world..." I felt tears slide down my face. He's going to die no matter what?! "I assume that, for starters, most of you are wondering about how me and (y/n) know each other..." I felt him gently take me away from Karma and stand me next to him, hinting for me to tell them.
"Until 2 years ago... I was known as the assassin 'Angel of Death'. The Reaper's little sister. He killed my father when I was 5, taking me with him. I lived with him ever since." I explained after calming down. I looked up, seeing everyone's face contorted in shock and surprise.
I listened intently as Big Brother explained what happened. I gradually got angrier and angrier. How the fuck could they do that not just to big brother, but to Yukimura-sensei?! By the end of the story, my fists were clenched, my lips were frowning and my eyes were closed. I let out a sigh and walked through the crowd of students. Before anyone could stop me, I sprinted towards into the forest, jumping from tree to tree. When it was appropriate, I started jumping from roof to roof until I reached my apartment.
The second I got in, I slammed the door shut and slid down the wall. I stared forward blankly. So Shiro's the guy who put Big Brother through all of that pain, huh? I already have an idea of what I'm going to do to him.
I'm not going back. I'm never going back to that classroom. That's not my world, and I understand it now. I don't belong there and I never will. I heard the window slide open and I look in that direction to see Koro-sensei holding Karma. Shit. I forgot Koro-sensei would know where I lived, considering he used to live here too and he's taken me back home before.
"I'm fairly sure that's breaking and entering, guys." I smirked, trying to relieve the tense atmosphere.
"Nope, didn't break anything." Karma replied, he was smirking but he seemed concerned.
"I guess this is the last time we'll talk, Karma." I said, he looked at me curiously in response. "I'm never going back to class. That's not my world and it never has been. Finally finding out what happened to my brother helped me realise that." his face immediately became stern. He stomped up to me.
"Bullshit." and with that, he kissed me. Hard. He seemed really pissed and it was like he letting it all out in the kiss. He pulled away and glared at me. "What the fuck are you thinking?! Do you not care about any of us?! After all we've gone through, you're just going to leave?! I can't believe you! You walk into my life, make me care and then just fucking decide you're going to leave?!" He was shouting at me by now, really frustrated.
"You don't understand! Ever since I've been here there's only been disaster. I was beaten, almost raped, sexually harassed and forced to hurt the people I care about! When I was an assassin, things weren't immensely easy but atleast people weren't trying to fucking rape me!" I screamed back, cringing slightly at the memories.
"You don't get it, do you?" he grabbed my shoulders and pushed me up against the wall. "I WANT YOU TO STAY BECAUSE I FUCKING LOVE YOU!" He smashed his lips against mine. I couldn't help but melt into the kiss. I wrapped my arms around his neck, deepening the kiss. I felt tears begin to roll down my cheeks. This is too much. He pulls away and hoists me up. "Which one is your bedroom?" he asks. He still seems kind of mad. I point towards my door and he kicks it open and pretty much throws me onto the bed. "Koro-sensei. Please fuck off." and with that, he slammed the door shut and locked it.

(A/N: Hey, it's Kai. Should I put a lemon in the next chapter? Please leave answers in the comments.)