Koro-sensei reached for the textbook and solved it just as fast as he opened it. My eyes widened and my heart rate reseeded. "Okay: opened, solved and closed. I more or less remember which questions are on which page in this particular series of test books. Math was a challenge. I'd lent that one out to a student for a long that I'd must have forgotten." Koro-sensei said. "You just happened to memorize the test books that I just happened to bring?" Principal Asano asked. "Heavens, no. I memorized all of Japan's test books. 'No moving out of the blast radius until you've solved the problem'? A rule like that is no trouble for a passionate educator. Here I thought you understood me, but it seems your student's defeat has unnerved you." Koro-sensei said and completed the next one. "You've dug your own grave with this simplistic assassination. The last book...it's your turn. What's it like? Having your own death right before your eyes? That grand kaleidoscope glimpsed in moments before death...What could be flashing through that perfect mind of yours?" Koro-sensei said and I smirked. "Well, Principal Asano? Will you open the final book? No matter how superb you may be, opening up a grenade-filled test book will not end well." Koro-sensei said. "Hey, this is your wager. If you don't wanna die, just gracefully admit defeat!" Yoshida said and the principal glared at him. "And besides, we don't care if you fire Koro-sensei!" Kataoka said. "It'll be sad to leave this place behind, but we'll go where Koro-sensei goes." Kanzaki said. "Even if it means leaving home or holing up some mountain, we'll keep the assassination classroom till March." Isogai said. "Koro-sensei, under my educational philosophy, you could very well destroy the Earth and it wouldn't matter." Principal Asano said and opened the book, causing a big explosion. Once the smoke cleared, I saw Koro-sensei's skin around the principal. I glared. "Have you forgotten my molt?" Koro-sensei said. "Your once-monthly trick, eh? Why didn't you use it on yourself?" Principal Asano asked. "I was saving it for you. If I'd won, there was no doubt you'd opted to blow yourself up." Koro-sensei. "How can you be so sure what I'd do?"The principal asked. "Because we have so much in common. Both stubborn educational fiend, aiming for perfection in teaching even if it means using your own life. I talked to your old cram-school students during the exams. About their impressions of you as a teacher, about what happened...The educational ideals I pursue are identical to yours dozens of years back. Where I've been lucky, compared to you, is with the E class. Because there are a fair number of students and because they share the same circumstance, they came together and withstand training and can ask each other for advice without holding things back. And Principal Asano, it's none other than you who made this E class. You've been unconsciously been carrying the ideal education you came up with long ago. I'm the only one this knife can kill. We do not teach the theft of human life. You and I share the same ideal: not a killing education, but one that let live. Let's keep following through with our ideal education. " Koro-sensei explained. "My philosophy is always correct. I've turned out a great number of strong students these past dozen years. But now you've acknowledged my system so I will deign to permit this E class to remain." Principal Asano said and I sighed. "'Still can't simply admit defeat, I see." Koro-sensei said and laughed. "Oh, and...May I come by and kill you now and then?" Principal Asano asked with a small smile. "Of course,that knife suits a worthy rival as well." Koro-sensei said and Principal Asano walked out of the building and stopped in front of me. I glared at him then he smirked. "Hope you had fun locking lips with my son." He whispered to me and my face turned red while he started walking away. "I hate you and your loser son, you narcissistic sociopath!" I yelled.

~elsewhere~

Principal Asano walked to his car and noticed his son standing in front of his car with a bandage on his face. "The perfect facade is crumbling...I can tell by your face you've lost again, Father." Asano said and the principal smirked. "Did you need something, Asano-kun?" Principal asked. "Just thought I'd come cheer up my loser father by asking for compensation for this along with a grade-A prime Kobe streak." Asano said. "Aha...Take me to court on domestic violence charges if you want. You'll never win against me, no matter how much you grow." Principal said. "What makes to say that?" Asano asked. "Because I'll keep growing, too. As an educator and as a parent." Principal Asano said and Asano smiled then touched the bandage that was on his face. " Did your girlfriend treat your wounds this morning?" Principal Asano teased as he got in the car. Asano followed while blushing a bit then he chuckled. "She's not my girlfriend, not yet anyway." Asano said and it was Principal Asano's turned to chuckle. "She's a nice girl." Principal Asano muttered.

~back to you~

"By the way, Sensei...Where's our reward for the exams?" Nakamura asked. "Oh right. I promised to tell you one crucial weakness, didn't I? In fact, I have surprisingly little power. I'm too specialized for speed. When I'm at a standstill, even a single human can hold back one tentacles." Koro-sensei said. I sweat dropped. "That be impossible..." I muttered. "Oh by the way, [Y/n]-chan, what did Principal Asano say to you?" Kayano asked. "Yeah, you seemed pretty freaked out." Kataoka said. "I-It was nothing." I said. "Ooh, now you have to tell us." Nakamura said with a smirk. "You were blushing so hard." Karma teased and I glared. "Stop pestering me, creepy tomato!" I yelled. "Look, she's turning red now." Itona pointed out. "I hate all of you." I said.

~the next day~

"A drama festival?!" The whole class shouted. "Now, when we're abut to take high school entrance exams?" Maehara asked. "I complained to Asano about it at the student council meeting, but he shot back." Isogai said and I sighed. I don't want to do this. "[Y/n]'s good a acting. She can play a part." I heard and looked up. "It's settled then." Isogai said. "Huh?" I muttered. After a few days, it was the festival. I waited for my cue. Koro-sensei ran off stage and I ran on stage. I was supposed to be the peach child. It was only a small part. I sat on the stage with a happy smile. "The peach child was a happy girl with a curse....the ability to see the future." Ritsu said and Kanzaki walked on stage. "Mama!" I cheered and she smiled. "How was your day, dear?" She said and my innocent smile turned into a creepy on. "Papa is coming for you....he's going to kill you." I said and stood up. My innocent smile returned and I skipped off stage cheering 'Mama's gonna die! Mama's gonna die!' In the end, everyone hated it. I smiled. The next day, I came to class late of course because I was tired. I walked through the halls when suddenly there was a crash. That woke me up completely. I ran outside to the track. "What the hell?" I muttered as I saw Koro-sensei come put from a big hole in the ground. "Koro-sensei." I called as the rest of my class came. "What in the world was that just now?" Isogai asked. Kayano came out of the shed with....tentacles? "Kayano...What's with those tentacles?" I muttered. "Aw man, I attacked with all I had, too. I can't believe I let him get away. I must have underestimated him." Kayano said. "Kayano, what in the world...?" Koro-sensei muttered. "Sorry, Kaede Kayano's not my real name. I'm Aguri Yukimura's little sister. You understand now, don't you? Murderer." Kayano, no Yukimura's little sister said. "Yukimura.." Hara muttered and realized something. I was still confused. "It's no use crying over spilled milk. I have y to reset. I'll try to kill you again tomorrow, Koro-sensei. I'll let you know where beforehand. Now that I've fought you tentacle to tentacle, I know for sure. I can definitely kill you as I am right now." Kanayo said and jumped away. Everyone was in shock. "Unthinkable. If she grew tentacles without any maintenance, she would have been under constant hellish pain. There's no way she could bear it without having it show on her face." Itona said. "Not only that, but she's Aguri Yukimura's little sister?" Maehara said. "Isn't that our old homeroom teacher?" Sugino said. "I thought I'd seen Kayano before somewhere. I remembered after seeing her with her hair down and a harsher expression. Do you remember Haruna Mase? The young acting prodigy who could take any role. It's been a while since she left the entertainment business." Mimura said and looked at the ground in. 'So she was acting the whole time..' I thoought to myself. 'She was my first friend in this shit school. What if everyone's lying to me? Do they really think I'm a monster.' Thoughts continued to run through my head. I clicked my tongue and ran off.

~~~

I stood on the field with my class. "So you came...Then, let's end this. Koro-sensei, I'm the one who gave you your name. I'm practically your mother, so I'll scold you and destroy you." Kayano said. "Kayano, it's too dangerous to keep those tentacles! If you you do not remove them or get them treated immediately, your life could be in danger!" Koro-sensei said. "What are you talking about? They're in excellent condition." Kayano said. "Kayano, don't be stupid! You're clearly turning pale. You need to stop this and tell us the truth." I said. "The truth? What do you know about the truth? For most of the year, you've lied to us. You've keep the secret of your dad being a wanted killer and the fact that you were a psychotic yourself. Everyone in this class pitied you and thought you were a total bitch." Kayano said and I looked down. "Kayano...Was it all an act? Even went we were having fun? Or overcoming trails together with everyone?" Nagisa asked. "It was all an act. I am an actor, after all. When Nagisa and [Y/n] was defeated by Tataoka-sensei, I was so irriated I wanted to join the fight, too. When I was kidnapped by the delinquents and kicked by the Reaper, I was so angry, I wanted to kill him. But I bore it and acted like a frail girl. Because if my identity was found before I killed him, I wouldn't be able to avenge my sister. " She said and I glared at the ground. "Your sister...Yukimura-sensei?" Fuwa asked. "It was unfortunate that she was killed by Koro-sensei. She loved being a teacher." Fuwa said. "Would Koro-sensei kill Yukimura-sensei just like that? He's never done anything that cruel in front of us before." Sugino said. "Yeah? At least hear him out, Kaede." Kurahashi said. "He was a teacher who even came all the way to my house when I suspended. But are you really okay with this? I can't imagine that what you're doing this now is the best way to solve this as an assassin." Karma said. "You're body probably feel hot, with just the nape of your neck cold. It's the abnormal metabolism characteristics of those implanted tentacles. If you fight in that condition, you'll be in trouble. You'll lose control with heat and intense pain, and your life-force will be sucked out by the tentacles. Worst-case...." Itona explained then Kayano's tentacles were lit on fire. "Shut up. Outsiders should be quiet. No matter the weakness or shortcoming, if it's polished, it can be used a weapon. You're the one who taught me that, Koroo-sensei. If my body's so hot I can't bare it, then I'll make it even hotter and gather the heat in my tentacles." Kayano said and smiled. "No! Any more and-" Koro-sensei said but it was too late. She made a ring of fire around the both of them. "I'm in the best condition. My body's so sensitive that I won't miss any openings right now." Kayano said and went crazy. The tentacles have taken over her mind. "I have to do something." I muttered. "Are you crazy?!" Maehara said and I smiled. "Yes, I'm psychotic." I said and felt Maehara grab my wrist. "No, you'll be killed." Maehara said. "There comes a day where a person has to repent for their sins. And if I die, I die. But someone has to help Kayano. Those tentacles have taken over her mind." I said. I could see her calling out for help.