Oh my God. I'm soooooo sooooo sorry for not updating earlier! Life has been busy, and I had countless music performances these past few days. Anyways, I managed to type this up in time. Also, IT HAS FINALLY ENDED. Not this fic, the anime I mean. And seriously, who didn't cry? I certainly did, the anime just made the manga version even worse for my feels. I would like to add that I'm working in something as an appreciation for the making of this wonderful anime and manga series. No, it's not a fanfiction because I already did one few months ago. It's a secret until I manage to get it out!

Anyways, in with the chapter!

The plan did not work as they wanted it to.

Dangit.

And now, they are stuck in a building with ultra tight security systems.

With no way to escape.

And Karasuma-sensei is not doing anything to help them at all!

Why must this happen to them?

Koro-sensei could be dying a t the moment and they are unable to help him!

Well, that was the thoughts that rant through every students' heads.

The students of class 3-E were trapped in a room, each sporting a miserable expression on their faces. It was really unpleasant to be hauled off to this building when they had clear intentions to save Koro-sensei.

A knock on the door was hear and they turned to see Bitch-sensei standing by the door with two guards hovering over her. She seductively flashed a little of her skin, and told them to leave her alone, which they did so, albeit with flushed looks on their faces. She then turned back to the students and grinned.

"Good, you are all safe... now let me give you all a kiss~!"

To their horror and embarrassment, their languages teacher kissed them fully on their lips. Of course, some of them immediately understood once they felt her pushing stuff into their mouths during her 'kissing frenzy'. They showed nothing to implicate the messages were being passed to them, however, as there were recording devices in the room, and discretely palmed the stuff into their pockets.

"Ne, Bitch-sensei, where's Nagisa? Is he alright?" Kayano asked, worried about her teal headed friend.

The blonde languages teacher waved her hand dismissively. "he's fine. I locked him up in his room so he wouldn't tro to escape."

"How did you even gain access to his room?" Nakamura asked suspiciously.

Bitch-sensei grinned. "He's living with me and Karasuma now."

Without waiting for a response, she strode out of the room and blew a kiss to the guards standing outside the door. They blushed.

Ah, such is the beauty of seduction.

Nagisa was bemused with his guardian's actions as he easily slipped out from his bedroom window. It wasn't that hard to unlock the latch, as the locking mechanism wasn't that complex.

Honestly. did his guardian really think he would just stay put after knowing that the closest thing he has to a father figure is getting assassinated?

Apparently not.

He had to be truthful to himself though, he was torn as to what he should call his blonde guardian. Should he still call her Bitch-sensei? Or should he call her 'mom'? He really didn't know, and he was conflicted with the turmoil of feelings he has in him.

As soon as his feet landed on the grass path, he leapt to his feet to exit the garden.

A distinctive 'meow' was heard and he turned to see Kuroh strolling up to him with a look in his eyes that seems to be saying "I know what you are doing, and it's wrong".

He hesitated.

Should he stay?

Then he looked into Kuroh's eyes again, this time with determination.

"Don't tell Karasuma, okay?" He whispered as he climbed over the fence.

Kuroh meow-ed again.

Nagisa sighed and patted Kuroh through the fence. "Alright, since you want to hear it so much," he muttered. "Don't tell dad, okay?"

Kuroh let out a purr of contentment.

And the teal headed boy left, not looking back. He is going to Koro-sensei, his teacher, one of his most repected people, his friend and his assassination target.

Koro-sensei panicked when the 'meteor' almost crashed into him by a millimeter. It was a good thing he was blessed with the speed of Mach 20.

He knew that it was time the ministry finally struck. He had long suspected it, and had been keeping his guard up as the days passed by. He also knew, it was time for him to die.

His mind wandered to the woman named Shiota Hiromi. He had injected her with some serum that will last for one more week and disposed her in a random forest in Okinawa. The rest really depends on her luck. If some animal eats her as its meal, then its karma taking place.

He straightened his back. He would hold out, until his students come back to him.

He is not invincible, he knew it. He knew that the challenge ahead of him would be tough, but he knew that as long as he goes on positively, everything would work out fine.

He would not allow anyone to finish him off easily.

For his students are the only ones who can assassinate him.

Karma beckoned to his classmates as they sneaked into their school campus. They were greeted by the sight of tentacles hurling towards them and they gasped while ducking out of the way. Koro-sensei was battling with another octopus-like being, and it seems like he is on the losing side.

"My, my, look who we have here..." the ghastly looking creature snarled out. "It is none other than your precious students!"

Koro-sensei did not reply to the mock tone, and instead let his eyes wander to his students. He immediately noted out the missing one. "Where's Nagisa?"

"Bitch-sensei locked him up," Nakamura replied. "What's going on? Who's that?"

"This, is Number 2," Koro-sensei began very seriously. "And this is the fight for our lives."

Then he gave them a big thumbs up with his ever so bright smile on his face. "Kyaa~ That sounds totally like something out from Naruto!"

Everyone sweatdropped.

"I wanted... to be like you..."

That was the scene Nagisa stumbled upon when he reached the wooden building of Kunigigaoka High School.

As he caught sight of the mess of the horrendous monster had made to his beloved school grounds, he also noticed the bruised and battered look his teacher was sporting. He saw his fellow green headed classmate in his teacher's tentacles, and the red fluid on the ground.

His blood ran cold as he raced towards his teacher. "Kayano! What happened to her?"

Koro-sensei, for once, sounded grim as he explained to them about him trying to improve his skills over the past year. Nimbly, he mended the large gaping hole in the green headed girl's chest. The rest of the students, on the other hand, watched him in awe as the wound closed up without even a scar left behind to signal that she had ever suffered such a traumatic event.

Then she took a deep breathe.

And coughed.

Kayano sat up suddenly, her hand instantly moving to her chest. She stared up at the yellow octopus that was her homeroom teacher. "You... saved me again."

"And I'll continue to do so, as many times as is needed. I'm positive your sister would have done the same. What is more important, is that you learn from and never repeat your mistakes again."

For a while, every one celebrated the miracle that their classmate was still alive. Then-

Koro-sensei fell backwards onto the ground. "Phew!" He exclaimed. "I'm beat!"

At that time, it was the first time the students of Class 3-E saw their teacher that vulnerable. They stared at the beaten teacher, conflicted thoughts in their minds. They did not notice Karasuma-sensei and Bitch-sensei making their way towards them.

"Come now, class," Koro-sensei spoke. "What assassin ignores a target knocking on Death's door?"

Don't you understand? The time has come to kill me.

"The fun times will have to end someday. That... is just what a classroom is."

They knew that if they don't move, something else would claim their beloved sensei's life. They want to assassinate him, yet at the same time, they don't.

Especially Nagisa.

He couldn't. After suffering under his mother's wrathful hand for such a long time, he wanted to enjoy his time with the yellow octopus and his silly jokes. He wanted to savor the idiotic-ness that often occurred during Koro-sensei's teachings.

"Nagisa," Koro-sensei spoke softly. "I'm sorry for noticing it earlier."

Nagisa shook his head, unable to speak, trying to hold his tears back.

"Please, just remember, you are never alone. You have a new family, and the E class to depend on."

Don't leave us so soon.

"Life is always full of ups and downs, and you are a strong boy, Nagisa. I know you can overcome any obstacle in your way."

"15 minutes left." Karasuma announced.

There was no need to ask what the countdown was for. The students already knew.

They moved to pin their teacher down, though it was done rather half-heartedly.

"So..." Nakamura began. "Who shall do the honors?"

"Please," Nagisa's soft voice could be heard. "Let me."

The gazes of every student of E class switched to him, including Karasuma's and Bitch-sensei's.

"Are you sure, Nagisa?" The blonde languages teacher asked worriedly.

Holding up the anti-sensei knife, Nagisa walked towards his teacher. His tears were welled up behind his eyes, and his hands trembled.

Yet...

They are assassins.

Their target? Koro-sensei.

They knew painfully well.

The directive that needed to be completed in order to honor their mentor's final wishes.

Their bond they shared ever so deep.

They didn't want to sever that bond.

Koro-sensei gave them a dazzling smile.

And Nagisa poised his hand in position, tightly holding onto the anti-sensei knife.

He would never forget, the memories he shared with this teacher, with the first ever adult who took the initiative to care for him. He would remember the times when the octopus gave him silly yet instructive tutoring.

He remembered when he first proclaimed that he wanted to be an assassin. Then he changed his mind and decided to use his skill for a better reason.

He wanted to carry on Korosensei's legacy.

He is going to be a teacher. A teacher unlike Koro-sensei, of course, as no one can be as perfect as him. He wants to be a teacher who is considered a friend and a guide to students.

"Nagisa," Koro-sensei smiled at him. "I'm so very proud of you."

And the dam broke. With tears running down his face, he lowered the anti-sensei knife onto the teacher's heart.

I love you, Koro-sensei. Thank you for the time you spent with us, thank you so much.

And cliffhanger! The next chapter will be the last, and I am truly grateful for all the support I've been getting for this fic. I understand that I'm not expressive enough for an angst writer, and I'm working hard to improve on that. So thank you all for supporting this fic all this time!

Yours,

BlueSkyBlue,

a.k.a. Otonashi Hayuka