Till the End of Time
Characters: Koro-sensei
A/N: The students' dialogues are on italics while Koro-sensei's dialogue is on bold-italic.
"I am so sorry, Koro-sensei, goodbye."
SLASH!
"Isogai-kun!"
"I am too scared to die!
SLASH!
"Kurahashi-san, Kanzaki-san!"
"NO, PLEASE DON'T DO IT!"
SLASH! SLASH!
"I BEG YOU, DON'T DO THIS TO THEM!"
Koro-sensei was devastated, his beady eyes widened in shock as he pondered on the terrible sight infront of him, his tentacles clenching and shaking in shock and anger.
He had failed these kids.
He had failed her.
He had sworn on his life that he will protect them at all costs, as he had failed to protect herfrom dying that night because of his mistake.
But he had failed.
"I am so sorry, Aguri. I never fulfilled my promise."
Now he was all alone, looking at the bloody corpses of his precious students, killed under the tentacles of his wayward apprentice.
The apprentice who betrayed him and put him in this horrible situation.
The apprentice whom he failed to nuture and love, the child who just wanted his love and attention, but because Koro-sensei is stupid enough not to notice the child's growing hatred of him, that child had been strayed from the right path because of him.
He crawled towards the nearest corpse, the body of his dearest troublemaking student, Akabane Karma, who was holding Okuda Manami's lifeless hand. It seems that at the last moment, the redhead chose to protect the meek and innocent girl, as they were both killed by Koro-sensei's apprentice in a blink of an eye. Their chests showed a huge gaping hole, where the monster had stabbed through them, their innocent blood gushed like a rumbling red waterfall. He also saw Nagisa's lifeless corpse not far away, along with some of his classmates' bodies.
All 29 of them, killed.
His colleagues, Irina and Karasuma, first perished while trying to protect their students, their bleeding bodies lying on the cold hard ground. Ritsu was not exempted too, her huge computer was also broken beyond repair during the fight, leaving her unuploaded data erased and disappeared, leaving Koro-sensei alone.
Koro-sensei shakily held Karma's hand, tears started to fall from his beady eyes, his permanent smile never radiated its usual cheerfulness, only sorrow and grief.
He screamed to the night, as he had never forgave himself for making them killed.
He is the Reaper, death always follows him everywhere.
It was a curse he couldn't escape.
"It was all my fault."
His tentacles contorted as his emotions distorted them, the boiling anger inside him is finally unleashed.
The monster he was destined to be was now unleashed, ready to grasp his prey.
Yanagisawa looked at the monster before him, smiling with glee, while Koro-sensei's apprentice was preparing to counterattack his master.
"You killed them! Now you two are going to pay for this!"
Koro-sensei looked and smiled sadly at his first student, as he proceeded to stab him at the heart. He knew it was not the child's fault for becoming who he is now.
Yanagisawa was also flung outside the anti-tentacle barrier, and being injected with tentacle implant leaving the scientist damaged beyond repair.
And Koro-sensei was happy for that. He finally got his revenge.
As his first student had been finally been put to rest, fading away to the dark, Koro-sensei landed on the cold bloody ground. He looked up, and saw the Spear of Heaven glowing brighter every second.
"It was time, but they are already gone."
Koro-sensei wanted his students to deal the final blow on him.
But they were taken away from him before they all do.
They can never follow their dreams anymore, they can never go to high school and college, graduate, work and build families anymore.
Their parents would grieve for the rest of their lives, and Koro-sensei would be blamed for their deaths, sealing his legacy as the monster who had murdered 29 innocent lives in one night.
Koro-sensei don't want to live anymore.
At least, he will be with them on the other side.
With his students.
With his colleagues.
With the his love of his life
Together till the end of time.
With a last look on his students' lifeless corpses, he whispered a lullaby he had cherished in his heart.
"Sensei loves you with all his heart,
It is time to say goodbye.
I will hope someday we will meet and reunite,
Happily together on the other side."
The clock strikes twelve, and Koro-sensei's eyes shed its final tear.
And a bright reddish white light shone on him and the whole mountain, as he faded away through the night.
It is a cruel fate that no one did expect.
A/N: Here is the 16th oneshot I made! This was based on the possibility of a darker twist on Assassination Classroom ending, where Yanagisawa/Shiro and the Second Reaper had killed the students first to make Koro-sensei hopeless and vunerable to die, but it only make Koro-sensei angrier.