Assassin assigned to assassinate the unkillable (A hxh and assclass crossover)

Class 3-E

It is currently 6:30am and Killua is currently in his bathroom finishing up his morning routine. His uniform for today was set on his bed for him to change into afterwards.

Killua refused to wear the blazer, so he just wore the vest.

Getting out the bathroom with his hair wet and a towel wrapped around his lower half, Killua had just finished his shower and was about to change.

Making sure he was dry all the way, he put his uniform on and then headed into the dining room, where his food was currently placed and Gotoh waiting for him.
"Yo, how was your day?" Killua greeted the man.
"It has started great. Today I will be your home economics teacher in class 3-E. Also be prepared to take down that yellow monstrosity." Gotoh informed Killua.
"Will do. You know I'm always prepared for a fight." Killua responded while stuffing his face with blue berry pancakes.
"I wouldn't doubt you for the world." Gotoh said while gracefully eating his food like gentleman.

After breakfast, Killua ran upstairs towards his room to brush his teeth and grab his bag. Running down the hallway in his socks, he slid down the rest of the way and slid down the tail of the stairs and did a flip off the stairs. He was at the door putting his shoes on for school, while Gotoh got the car ready for departure.

Exiting his home, Killua entered the vehicle with the door held open by Gotoh. Closing the door, Gotoh walked around the front and entered the drivers seat and soon drove to the school.

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Finally arriving at the designated school, Killua and Gotoh exited their vigils and walked towards the principal's office to notify him of their arrival.

When they walked up the school many people commented on their appearance and questioned as to what their purpose of coming here was.

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Arriving in front of the principal's office, Gotoh knocked on his door, thrice before receiving an answer.

As they walked in, they took in the dark setting and a murderous aura inside the room. Inside there was a man sitting in a chair, in front of a desk.

"I am the principal of this school, my name is Galicia Asano. I assume that you are the assassins that I was informed that are entering class 3-E to abolish Korosensei." Gakuho introduced.
"I am Gotoh, the servant of my young master that stands before you, Killua Zoldyck. You are also indeed correct." Gotoh responded.

Gakuho then opened a drawer and took out a folder with their information, which was limited.

"I see. It seems like your info must really be classified, if even I could not get access to it."
Gakuho said, obviously displeased with lack of information. "Well, I'll get this over then. Your building is located on the mountain behind the school. There you will meet Karasuma, an agent from the ministry of defense. He will give you the weapons necessary to kill your teacher. The kids have named the creature Korosensie, as I have earlier mentioned. He is the main teacher for that class." Gakuho debriefed them of the info, while giving them a map towards the mountain top.
"Thank you." Gotoh replied, while taking the map out if his hand.

Killua stood there, while the adults were talking, observing Gakuho carefully. After there conversation, Killua and Gotoh headed towards the exit.

Exiting the office, Gotoh and Killua were finally starting to make their way to the old school building.

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They finally arrived at their destination after following a long map. The distance was no problem, they didn't even break a sweat. Just for the fun of it they did parkour all the way to the top, while attacking each other.

Making their way towards the door of the old school, they realized how it doesn't look as well preserved as the other building they previously saw. Entering the school they were greeted by a woman around her twenties.

They approached her in the purpose of asking her for some directions.

"Exude us miss, but could you possibly lead us to the staff room?" Gotoh ask politely.
"Oh, you must be the new recruits that I have heard about and yes I'll take you to meet Karasuma." She said while starting to guide them to the staff room. "Oh, my name is Irina Jelavic." Irina informed them.
"I'm Gotoh and this child is one of the elite assassins assigned to this mission, his name is Killua Zoldyck." Gotoh introduced.

As Irina heard the surname Zoldyck, she turned around so fast, that even Korosensei would be surprised.

"Y-you mean, The Zoldyck? The Zoldyck family that is filled with world wide known assassins! This little boy is part of that family?" Irina exclaimed. Surprised that the government would go so far into killing the octopus, that they would hire a Zoldyck.
"Yes that's me." Killua responded monotonously.

They soon arrived at a door that abruptly opened. A man stood with black spiky hair and a tall build.

"Oh, you must be the new recruits? I'm Karasuma, and behind me is Korosensei." Karasuma turned out of the way to intro dice the creature behind him.

Walking inside Karasuma briefed them of their tasks. "These weapons are especially made to harm him and are specialized to his structure so that no human can be harmed." Karasuma said, handing them the weapons necessary.

Grabbing the suit case that was filled with twin hand guns, anti-me bb's, and green knives, Killua and Gotoh exotics the room and were led to the classroom.

Approaching the room, Korosensei, Karasuma, and Irina walked in and introduced us to the class. Once Killua and Gotoh heard a come in, they entered the classroom.

Walking in Killua noticed all students that were patiently waiting for any fun facts that they would announce.

"Hello, my name is Killua Zoldyck and I have been assigned on this mission. So don't get in my way." Killua threatened. He released an intimidating aura that could choke someone to death.
"Okay, enough of that Killua. My name is Gotoh and I will be your new home economics teacher. I hope we have fun together." Gotoh said, as he bowed to them. "I am also Killua's guardian while we are here." He added on.
"Is there any questions?" Karasuma asked the students. 3 held their hands up.

"Alright, Nagisa." Karasuma said, as a young boy that was quite feminine and small, dropped his hand down.
"How old are you Killua-kin?" The blue hair teen questioned.
"I am currently 12 years old." Responded Killua.
"Next Karma." Karasuma continued.
"Are you really an elite assassin?" A boy with red hair asked, while leaning back on his chair.
"Yes I am."
"Kayano." Karasuma called.
"Where are you from?" A green haired girl asked.
"I am from Padokea. A place that you have probably never heard of."
Killua responded with a straight face.

"Now we are about to start class. Killua you may sit on the left of Karma." Korosensei instructed as the other adults exited the classroom premises.

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Excuse any mistakes I may have written.

All credits go to their rightful owners. I do not own these characters, this is only a fanfic.