Ansatsu Kyoushitsu x reader : A Student-Teacher Assassin?!

A Job Entrusted to You

The (l/n) family...
The family filled with proffessional assassins and training. One of the best assassins existing. The family was always trusted with difficult assassination jobs and the jobs were always completed. But for once, this could be the longest and hardest assassination job trusted to them. Could they accomplish this hard task...? After all, you wouldn't really be considered as...normal.
***

Sounds of punches and hits echoed throughout the large manor. Training was always essential for the family of assassins, so they trained regularly, more specifically, (l/n) (y/n).

Her family saw great potential in her as she was the strongest among her siblings-her older brother Haru and younger twin brothers Kaito and Akaito. The one who seen the most potenetial in her was her father. After all, she wouldn't really be considered much as a ...normal human being.

As (y/n) kept training and training, Amari, her maid and guardian approached her saying, "Miss (y/n), your father is requesting your presence." (Y/n) had stopped training to wipe the sweat off her face and  thanked her. She glanced at the wooden target she's been punching, satisfied that the wood was already broken from her powerful punch. She rushed off to find her father, her footsteps echoing through the white hallways.

Walking to her father would really take time considering the house was gigantic. So instead of walking she dashed off with inhuman speed towards her father's room, her (h/c) hair following after. She slowed to a stop when she came face -to-face with the door to her father's room.

She was about to knock until she heard a muffled "Come in ,(y/n)." She did as she was told and entered with a small gulp. After all, her father was indeed frightening when angered. She opened the door  and her (e/c) eyes met piercing (e/c) ones. She stepped into the room quietly.

"Is there anything you need, father?" She asked. He sat up from his slouched position on the bed and said, "I have a job for you (y/n)." The girl's eyes sparkled with excitement .

"Who is the target father?"  She asked. "This task may be quite difficult. The target is said to reach mach 20 and cannot be killed with regular weapons." The girl listened on intently as her father continued.

"The government has given us some specialized weapons created to kill the target, and suggested that we let you join the E Class of the school Kunugigaoka as a student. They also requested you be a part-teacher since of your many exoeriences." He handed her a photograph of a yellow creature with a chesire smile.

"They have informed us that this is the creature who blew up the moon and is planning to do the same with the Earth next March. Only the world leaders know about this matter. If it got spread out to the public, it would have panic. Also, For whatever reason, he insists on being a teacher at the so-called E Class which serves as a great opportunity to kill him."

You will be enrolled to the E class and will be tasked to kill this 'teacher'." He stated calmly. "You will be sent to Kunugigaoka high and I will provide you with your needs such as an apartment, money, and etc." He continued. She was  quite shocked but still regained her calm personality.

"You may start gathering your things as soon as you leave the room. I suggest you pack a lot considering it will probably take a lot of time to kill this creature. And, as a teacher in that school, you aren't permitted to hurt any of the students.

Good luck (y/n). You can put your ability to use." He said with a small smile. The (h/c) girl smiled back and left the room. She dashed off to her room and started gathering her belongings. She took a look at the weapons given to her and examined it.

She grabbed the green rubber knife and bent it. She put it down and grabbed the BB pellets. "This is supposed to kill him?" She thought to herself. She shook off the thoughts and packed the weapons in her (f/c)  luggage bag.

She tucked the photograph of the creature into one of the zippers. When she finished packing, she just let the bag lean on her (f/c) bed and left the room to train some more.

She calmly walked through the empty halls of the mansion until she reached the training field. Her eyes caught sight of her twin brothers practicing hand-to-hand combat with one another. They turned their heads to face their sister and their dark blue eyes lit up. They ran towards her and gave her a hug, her doing the same while patting their black hair.

Hey! Even assassins need love from their family. They raised their heads and gave their sister a toothy grin (akaito's tooth is on the right, kaito's is on the left) saying, "Did you see us onee-chan?"

She laughed and said "Mhm! You two are really getting better!" Akaito then said, "Onee-chan, I heard that you won't be home for a while because of a mission." "Yeah! You won't forget us while you're gone right?" Kaito added. The girl smiled sweetly and said "Don't worry, I'll never forget my awesome little bro's!" They all laughed and then hugged. They started training right after.

***a few hours later

*bang, bang, bang*

Bullets shot right through the metal, perfectly hitting the targets. (Y/n) put the gun she was holding down and gave a sigh of exhaustion.

Training was fun for her and all, but the thought of trying to assassinate a creature that was technically unkillable was slightly stressing her out. Even more when the creature planned to destroy Earth the next year.

She was about to stop by her room to grab her things because she was supposed to move into her apartment by tomorrow, but she wanted to keep training to improve her skills. Her helicopter was supposed to drop her there tonight so she could set up her things. "I should get going..." She said as she started keeping all the guns and weapons she was using

As she turned to leave, she made eye contact with greyish blue eyes. She took a small step back and said, "Hello~Haru." Haru just gave a small smile and brushed his dark blue hair out of his ocean blue eyes.

"So I heard you won't be here for a few months." He said. "Aww~ Is someone gonna miss me~?" The girl said with a taunting tone. He calmly replied with a smirk, "Hmph, not as much as you're gonna miss your favorite little pony~"
She angrily snapped back at him, "For your information, Magis is not a pony, he is a steed!"

He just laughed and said, "Heh, I won't do anything to your horse, calm down. Seriously though, wish you luck!" He shouted while walking away and waving his arm. She watched as her brother's figure dissapeared into the shadows. She let her gaze linger on the area where her brother was a few minutes ago. She turned her head and looked down.

The (h/c) girl just smiled and laughed quietly while walking to her room.

***
(Y/n) made her way to the helicopter, her (h/c) hair blowing everywhere. She grabbed her luggage back and stepped into the copter. She tightened the straps on the bag so it could stay in place when the vechicle would have a bumpy flight.  As the helicopter ascended from the ground and into the air, (y/n)'s family waved goodbye as she waved back.
"BYE!SEE YOU SOON!" She called out.

"BE CAREFUL ONEE-CHAN!!! EVEN THOUGH YOU ARE REALLY SKILLED, DON'T DIE!!!" the twins shouted in synch. "Oi, (n/n) don't die on me!!!" Haru shouted. "Don't worry! I won't be the one who comes back dead!!!" She shouted back.  The helicopter started flying further from the mansion until all she could see was the trees and grass of their manor.

She took out the rubber knife and kept bending it. It became a toy to her as she kept spinning it between her fingers. Gazing out the window, she gave out a sigh. She closed her eyes and placed the knife on her lap.

This feels like it's gonna be a long assassination...