Hiya guys! I don't have much to say, though, just that I'm hoping that you guys are doing well!

This story... Well... It'll be updated every Wednesday (hopefully), and if you have any questions, just ask in the reviews! Or you can PM me; whatever suits your taste.

Flames are not appreciated, although construction criticism isn't much of a problem.

I'll only be using the following Japanese words;

Sensei- Teacher

Nii-san: Older Brother

Maybe I'll be using 'San' or other honorifics, but I'm not too sure.

Anyways, I'll stop wasting your time. Please enjoy -grins-

I do not own either anime.

Chapter 1:

The silver haired boy woke up groggily, rubbing his tired eyes as he got out of bed. He walked into the bathroom, and did his usual routine.

Walking into the kitchen, the teen began to make pancakes for himself and his younger sister. Fifteen minutes later, another door opened and a cute raven haired girl walked outside, rubbing her eyes sleepily. Upon seeing her precious brother, sleep immediately vanished from her eyes and she brightened up.

"Good morning, Killua-niisan!" She exclaimed brightly. Killua smiled, flipping the pancakes before replying to his sister.

"Good morning, Alluka. Did you sleep well?" He asked coolly, making his sister smile even more, if that was possible. "What about Nanika?"

"We slept really well, Nii-san! What about you?" Killua turned off the stove, and put the plates on the table and sat down, Alluka joining him.

A year had passed since Killua and Alluka had disappeared off from their world. Gon, Leorio, and Kurapika knew where he was, but they kept their lips shut tight. This was shocking, coming from the biggest loudmouth ever; Leorio.

Alluka's power was dangerous. If it fell into the wrong hands, the results would be catastrophic. They needed to keep Alluka somewhere no one could get their hands on her. That meant that Killua needed to be with her at all times, and even if he was not needed, he still would've been with her, considering that she was his sister and he loved her. The plan was incredibly simple. Kurapika was the one who had suggested it.

The Kurta had gained a lot of knowledge from everywhere, and one of them was called Teleportation. Apparently, Kurapika had a friend who could transport people into another world with the usage of Nen, and so Kurapika had asked him a favor, which his friend had agreed. Killua and Alluka were sent into another dimension, much to Killua's annoyance. He couldn't keep in contact with any of his friends, especially Gon. And he couldn't train his Nen, either, because this world was normal. No magic powers, no Nen users, no nothing. And it bugged Killua.

"Nii-san," Alluka's cute voice brought him back to reality.

"Hm?"

"Can I go to school?" The piece of chocolate-sauce covered pancake floated inches away from his lips. Killua was not expecting that question. "Please, Nii-san? I'm twelve, and I need to go to school, and it is safe here, right?"

Alluka deserved a normal life, that's what Killua said. A normal life meant school. But if he was away from the girl for even an hour, he'd panic.

Killua knew that he was protective of his sister, especially after what she'd gone through during her younger days. But if he wanted her to forget and move forward, and continue her life with a smile, then she needed to experience school life. With that thought in mind, Killua opened his mouth and dropped the pancake inside.

Swallowing, he nodded.

"Sure, why not? You do deserve it," Killua swore that if she continued to smile like that, her lips would fall off. But he loved it when Alluka smiled. He was her brother, after all. Her happiness was his happiness.

"Thank you, Nii-san!" Alluka exclaimed happily. "Why don't we both go to school together, ne? It would be so much fun!"

School together?

Ugh, Killua hated to even think about attending school. Despite being good at maths(he just found that out after trying to educate Alluka by himself), he despised that subject.

But Killua didn't want to disappoint his sister. With a curt nod, the ex-assassin gave his response.

"I'll think about it," his sister just smiled in response, chewing her pancake. "I do remember a school I saw when I was strolling a week ago..."

Killua trailed off, licking the chocolate syrup that was running down his lips.

"You'll be attending Kunigigaoka Junior High School. I'll go send in your administration." This was one of the happiest days of Alluka's life.

"Be careful, okay, Alluka?"

"Hai, Nii-san!"

"Don't get into trouble, ya hear me?"

"You're acting like one of those overprotective fathers from those TV shows, Nii-san," Alluka rolled her eyes, but the happy grin was still plastered on her face. Killua ruffled his beloved sister's head lovingly.

"Nanika, make sure Alluka doesn't do anything stupid. And take care, both of you,"

"Aye, Killua."

Killua watched as his sister practically ran inside the building. He chuckled, and walked back to their apartment, hoping that his sister would be all right. He shook his head, knowing that Alluka would be just fine.

Killua did not want to go back to the apartment now. It was so long since he had taken a stroll outside, lost in his own thoughts like he would back in his own world.

However, Killua got too absorbed in his thoughts that he didn't notice that he had gone too deep into the forest.

"Great," the Zoldyck muttered. Suddenly, his sharp senses picked up a powerful aura and he pretended not to notice.

Killua thought that the person would leave soon, but it turned out that the said person was stalking Killua.

"Come on out," he ordered. "I know you're there."

"Nurufufufufufufu," came the laugh from the trees. "Sharp senses, I see!"

Killua snorted, finding the voice incredibly stupid. When he turned around to face the stalker, he did not expect a tentacle man. He was an octopus, Killua observed. He bit his lip to prevent himself from bursting out laughing.

"What's your name?" The octopus asked. Killua raised his eyebrows.

My mother taught me not to talk to strangers, Killua thought. Screw this, my mother didn't teach me anything useful other than assassination.

"Killua," the white haired boy replied. "What do you want?"

"Straight to the point, I see!" The octopus laughed stupidly, making Killua roll his eyes. "You've got a really sharp aura, there,"

Killua tensed, his eyes going dark. If that thing knew anything about him, he'd kill him without a second thought.

The octopus noticed that.

Fuck. I let a little bit of killer intent leak out, Killua cursed mentally.

"Well, Killua-kun, don't you have school?" the octopus questioned, making Killua scoff.

"I don't go to school, octopus," the ex-assassin replied, his eyes calculating. The octopus's yellow face expression turned as a purple cross mark appeared on his face.

"Oh no, every kid needs to go to school to learn!" He scolded, no, he scolded Killua.

Killua twitched, annoyed that a strange creature was scolding him. And wasn't this world supposed to be normal? What's a dumb octopus doing here, anyways?

"Call me Koro sensei, though, that's what my students call me." Koro sensei- nah, octopus sounds much better- said, grinning brightly. "You should go to school, just like your little sister, Alluka-chan." Killua's reaction was faster. Before the octopus could react, Killua lunged at him.

Although the octopus dodged his attack, he knew that Killua was holding back.

"Now now, calm down, Killua-kun-"

"How do you know about Alluka?" Killua demanded, his guard up, going into assassination stage # 1.

Koro sensei blinked. "I saw you dropping her off at the school," he replied like it was an obvious answer. "But Killua-kun, you should join my class, 3E. They're a bunch of gifted children, but aside from studying, they've got a different motive, and I want you to help them achieve it." Killua scowled at that. He, helping a bunch of bratty kids? Hell no.

"What is in it for me?" He raised his eyebrows, removing himself from his attack mode, but still keeping his guard up.

"You get half the share of the money," the yellow octopus offered, letting out a 'geee' at the end. That reminded Killua of Gon. He shook off the thought.

"The money?"

"The main motive of the children is not to graduate with flying colors," Koro sensei started. "It is to kill me, who destroyed the moon months ago, and is planning to destroy the entire planet in March." Killua froze. March? That was… so close!

Fuck, just when I thought that Alluka be safe… Killua thought bitterly.

Killua enjoyed assassination. He enjoyed tearing his opponents apart. This chance was too great to pass up. Plus, he'd get the money, and he could buy Alluka whatever she wanted. He wanted to spoil his adorable little sister.

"Fine, I'll think about it," the octopus nodded, and flew off. "OI! You forgot to tell me the name of the school! Fucking octopus…!"

"How was school, you two?" Killua, who was still annoyed at the earlier events, asking his sister.

"It was awesome!" Alluka exclaimed. "I made a few friends, but every one of them refused to hang out with me after school because they were afraid of falling into this class called 3E." Killua's ears perked up just as his sister spoke the name of the class. It seemed familiar.

"3E?" He echoed, placing his sister's favorite food on the table while the girl snatched it up and gobbled the burger up hungrily.

"Alluka, manners. Nanika, what is this class 3E?" The girl began to eat slow and mannered as her eyes grew blacker.

"Class 3E is the lowest class of the school, Killua," the second personality of his sister replied. "They're shunned, and treated badly. All the students are afraid to get transferred into that class, so they study a lot harder." Killua leaned back in his chair, smirking broadly.

3E, huh…? Sounds like a very amusing class… He chuckled, confusing his sister. He shook his head and continued to laugh.

"Ehhh, but you said that the new student would arrive today, Koro-sensei!" The octopus sighed, rubbing his head with one of his tentacles.

"Ah, perhaps something came up? He doesn't seem like the type to be late…"

"Did he chicken out, perhaps?" Karma suggested, grinning broadly.

"Judging by his picture, he doesn't seem like the scared type," Nagisa spoke up. It was fifth period already, but their new classmate wasn't there yet. Koro-sensei opened his mouth to answer, but something cut him off. He didn't sense it. Nobody did. And just like that, three of his tentacles got cut off, and hit the floor with a squelch. At the same time, a boy landed on the ground, one knee on the ground, his hands in his pockets. His eyes gleaming with mischief.

"Heh~! Only three?" He seemed down because of the number of tentacles he brought down. Getting up slowly, he turned towards the shocked teacher with a sadistic smile. "Sorry I'm late, Octopus. I forgot that I had school." He played with the anti-Koro sensei knife like a pro, throwing it in the air and letting in land in the small pouch on his left leg. His sinister grin widened at the shocked look of his new classmates. "How many more tentacles should I go for next time?"

I hope you all liked the first chapter. I'll make sure to update longer chapters, but I'm not sure if I'll be able to do it -nervous laugh-

Please tell me if I made any mistakes whatsoever, because I'm still learning -grins-

Anyways, take care and be safe, all of you! Remember, every Wednesday! So look forward to it, maybe?