The screen flashed up to Karasuma who held up a green knife and his face grew graver. "You must keep this absolutely secret from your family and friends. There's no time to lose. If the earth is destroyed, we'll have nowhere left to run. and that's about it."

"We only have one year. if we can't assassinate him by then, the earth will be history." Nagisa thought nervously.

"Excellent!" he said and closed the role call book. His face turned orange with a circle on it. "That makes me very happy. Everyone was exhausted from all the shooting.

"He's too fast."

"So the whole class shooting him doesn't work?"

"Too bad. Not a single bullet hit its mark today, either. Methods that rely on sheer numbers lack any individual thought. Line of sight, barrel position, finger movement each of these is far too simple. You've got to be more inventive! Otherwise... you'll never be able to kill me at my max speed of Mach 20," Korosensei said.

"No way did you seriously dodge all of those!" Nakamura accused.

Sugino examined the pink bullet in the light. "I mean, these are just BB pellets. You could have just taken them on the chin."

"Yeah, that's right," Nakamura whined, slumping. The class murmured in agreement while Koro-Sensei sighed and shook his head.

"Very well, Gather up the BBs and them over," Koro-Sensei told them dryly, reaching out one of his tentacles.

Okano frowned and handed over her pistol, gasping quietly when the tentacle took the guns.

"I told you: these may be harmless to you... " He shot one of his tentacles off, making the class gasp.

A majority of the students jumped at the sudden noise.

"You know, you could have given us a little warning," Minura said, frowning.

"But, where would be the fun in that?" Koro-sensei's grin widened. "But they're special anti-me BB pellets developed by the government-"A close up of the round pink bullet showed a black logo of Koro-Sensei and the words S.A.A U.S.O engraved on the casing.Their teacher continued. "-If one hits me, it'll slice through my cells like tofu." Some of the class cringed away in disgust when the severed tentacle flailed around on the floor like a fish.

"They'll regenerate a few seconds later, of course. I'm more concerned about you putting a classmate's eyes out." Hara chuckled.

"That would have been a lot of paperwork for you Karasuma-sensei." Nagisa's eyes were wider than before, but then Koro-Sensei smiled bigger. "No shooting in the classroom unless you're trying to kill me." Then Koro-Sensei's face grew mischievous as several green rings appeared around his head. "And I hope you can kill me before graduation."

The Class focused on the back of the seat. "Where do you think he's from ?" Kimura whisper to Meahara who's picking his ear wax and flick it at him.

Kimura abruptly stood up and dodged it. "ew ! That's disgusting !"

Meahara smirked after he watched Kimura show off his skill and accidentally kicked at the innocent table beside him as fell down the floor and groaned. Maehara laughed and lean back his chair. "How would I know ?"

Kimura shot him a glare , grunted in pain.

"Hey! Our lives aren't a TV show!" Okajima shouted.

Kayano shrugged. "I don't know, this seems pretty entertaining to me."

Nakamura yawn , stretching. "Yeah , i even wrote a song for it." A playful smirked spread across his lips. "Hello, it's me." She began to sing , strolling over Nagisa's table.

"Oh god...." Sugino pinched the bridge of his nose. "Nakamura please shut up."

Nakamura bottom lips trembled , pouting. "But I put so much work into my voice!"

"I was wondering if after all these years you'd like to meet.." Sugaya grinned.

Sugino glare at the other intruder. "Sugaya-San.....no."

Okajima smiled , exchanging  glances at the both singing student. He first clear his throat then fall on his knee and expand his arms out. "HELLO FROM THE OTHERSIDEEE !"

"Oh Hell No !" Sugino raise both of his arm in surrender and jump out of his seat , he rush out of the room leaving the others behind.

Kayano hazel eyes brightened. "I've must called a thousand timesss"

"To tell you I'm sorry !" Meahara clench at his shirt with another hand on his head , posing dramatically as three of them united. "FOR BREAKING YOUR HEARTT !!"

"Shut up !" a voice hissed.

Nakamura held up a middle figure which salute Terasaka , angering the boy.

Nagisa only chuckled at his friend behavior before he smiled, relaxing. "Before Korosensei destroy Earth..." he stare ahead at the classroom "i'll definitely be the one who will kill him..after all...."

"...We are killers." he looked over his shoulder at the octopus. "and our target..." The creature moved at mark twenty and started to polish the nameplates."wipe, wipe, wipe it clean."

The action made Nagisa smile grew. ".... is our teacher."

Kayano looked up, tapping her chin. "An unkillable teacher..."

"huh?" Nagisa glanced at her.

Her brow furrowed. "(Korosenai) for unkillable..and (sensei) for teacher....." she murmured to herself, and then clicked her fingers. "Oh! what about Koro-Sensei?"

"Koro-sensei?" Nagisa repeated.

Koro-sensei suddenly perked up. "nyuh ?"

Nagisa thoughts that about it before smiling at him. "So here we are with koro-sensei...in our assassination classroom."

The soften melody slowly started faded away , oddly.

"Oi, Nagisa, did you hear?" Fuwa nudged his shoulder , earring the bluenette attention. "That we are getting another transfer student? " she called out to one of her friends, Shiota Nagisa.

Nagisa smile dimmed , his expression turn to visibly confused. "We have a new student ?" He arched an eye brow. Okay the news caught him a bit off guard , not going to lie. "But they never sent a picture of the transfer student at all. They should at least warn us about it."

"Wait ," Kayano overheard the conversation pipe in. "We have another new students ?!" she exclaimed , standing up too fast from the chair."But we didn't even have a chance to know this Octopus !" She pointed almost accusingly at Korosensei who's unaware of the situation, eating his sweets.

Meahara glared and hissed at her , signaling to be quite. "You're too loud !" he hushed , looking around to make sure no one over heard their conversation. Thankfully the other students were busy coming up plans and learning , studying about the creature A.K.A Korosensei.

"Wait , how did you know about the news ?" Nagisa turn his voice in to a soft whisper , his blue hair which was styled in two pigtails fall due to its length and averted his azure colored eyes.

The scene cut to a boy , sitting in alone in the room. A flashback crossed his mind , showing a destroyed building.

"If you..." the woman's voice was faint.

The camera surveyed a destroyed building. The scene flashed to a black tentacle creature standing over an injured woman.

"If you would give your time..." she said faintly. "Go teach those children." Then a close up showed the woman gently touching the tentacles. "What splendid tentacles...."

A silhouette of a little boy hid behind the damaged wall , staring up the tentacle creature that was a dark figure.

The screen cut back to the classroom.

Fuwa hummed , closing her eyes and trying to refresh her memory. "I think I just overheard the teacher conversation..." she said , unsurely .

"Maybe you overheard it wrong ?" Kayano pull out a sweets from her bag , hiding them under the table so she won't get caught for eating inside the classroom.

Fuwa frowned at the statement. "Are you saying I have bad hearing ?"

Kayano didn't answered , ignoring her questioned and continued taking a small bite at her pudding which made Fuwa scowled turn deeper.

"That's odd , sending the octopus is already a bit surprising but sending a new student in at the same time ?! " Nagisa brow furrowed , slightly confuses about the situation but he decide to go along with it. "Do you think he or she is an assassin? " Nagisa questioned.

Another voice chimed in. "I hope the student is a girl! " the camera zoomed backward to show a boy with short black hair in a butch cut thick eyebrows exclaimed hopefully , a grinned crossed his face. This boy is Okajima Taiga. Aka a pervert.

Sugino pipe in, leaning his chair between them. " I'm sure the student is just a beginner like us. Almost every transfer student is in here. Plus the fact that our class has special circumstances. " he pointed out , supporting his head with his arm.

"Well as long is a girl , i'm fine with anything !" Okajima shrugged , smiling brightly which earn an eye roll from Kayano.

Nagisa smiles warily at his classmate who continue joking around. He stare out the class room , watching the clouds above moving ever so slowly. The whoosh of wind blowing past the opening wall. It was strangely clam for a second. "I wonder .. who was it.. ? "

The screen zoomed out to show the old classroom. In a classroom full of beginner assassins. The bells signal the start of another school day. The screen faded to black.

 A flashed back : Nature and shallow light from the permanent crescent moon , hollowing over the boy who stood alone at the edges of the crumbled floor.

The camera shifted up as he watched the man disappear from human sight. The intense music pick up in pace and a glimpse of red moved as soft beach grass in the wind , back and forth , hiding the gold of his eyes. 

The silhouette of the young boy stood there , looking at the lifeless boy....at her lifeless body and he knew the only way to stop this is to join him. 

"top of the morning to ya !"