【The Assassin and The Slayer】～ (OC x Nakamura Rio)

Chapter 1:Lin Sasaki

It was night time.Fresh air was in the air,peaceful and sounds of the birds chirping.Until a scream was heard,of course at this time.It was quite normal,for demons to appear and eat.Demons were now like humans,their appearance is similar to humanity.Except for their eyes and taste.Mostly human food,Demons can't blend in very well compared to the old times but still they were in a killing spree.

A snake like demon was chasing a blue haired feminine boy,the boy was running away from fear.

"This isn't what I wanted,I wanted my mother to be with me again but not this.I never thought about this,she...she.."the boy murmured.

"Nagisa?,what are you doing here?"a red headed boy said in the corner of the alley with a beaten up person with bruises.

"Karma-Kun?!,Ru-"Nagisa paused as he felt something pushed him hard.

As he fell,he was quickly catches by karma.They both heard a scream of a man being ripped apart,both looked to the source of the noise and saw the man being eaten.

"Nagisa,is that your mother?"Karma asked shockingly.

Nagisa was paralysed,not knowing what to do.Until they heard footsteps.They saw a certain blonde being held hostage what appears to be a demon,a man with a strange clothes.Red Eyes with slits like a cat.His nails about to dig in the blondes neck.

"Oh what a failed test"the man said.

He looked to the blonde,grinning.Licking his lips.About to dig his nails into her until the bluenette tried to interrupt them.But a blue fire appeared on the mans hands.The man let go of the girl and looked terrified at the sight as he ran away without hesitation.

"Nakamura-san,are you okay?"Nagisa asked.

Nakamura nodded as a response while gasping for air.When she looked up,she saw someone.But that someone had blue flames,blue flames being produce in the right hand.It was a boy with big rounded glasses in their age,his height was a inch taller than the red headed boy.He had black mark flames on his left cheeks and two black stripes on the right cheek.His right hand with Long nails while producing the blue flames.He had a black coat with a katana on the left side of his hips.

"Damnit,he ran away"he said as he stop producing the blue flames with his nails becoming shorter.

"Anyways,are you all okay dipshits?"he asked coldly.

"Yes,but is that how you talk to others?"the red headed said sarcastically.

"Yes,and if I didn't interfere this.It would be blood bath"he said,threatening them.

"Lin,you can't just wander off like that"a voice said.

They all look to the source,they saw a white haired boy with glasses.

"My bad,Aniki"Lin said.

"Oh so who are they?"the white haired boy said.

"Nothing,just some twats wandering"Lin said sarcastically.

The white haired boy smack Lin's head,pulled his left ear and scolded him.

"Sorry about my little brother,he is just a tsundere."the white haired boy said.

"Fucking bitch,I ain't tsundere you little fuck"Lin said while his cheeks with a small tint of blush.

"Anyways,I'm Gabriel Sasaki.A Special Class Demon Slayer also known as the White Reaper of the CCDSC.And over there is Lin Sasaki,Associate Special Class Demon Slayer also known as the Black Reaper of the CCDSC"Gabriel introduce himself as he points his finger to Lin during their introduction.

"Now the introduction is done,do you know this woman"Lin said as he shoved the snake demon in front of him.

Nagisa's eyes widened as he saw her mother,her mother being a demon.Nagisa watched as Lin about to pull his katana until Gabriel interrupted.

"Lin,as an order of a Special Class Demon Slayer.I gave you the order not to kill the demon without the bluenette's explanation."he commanded.

Lin looked mad but followed the order.As he retreated his hand from the katana.

"Well,it all started out of nowhere.I was about to enter my house,but suddenly I saw my mother.She was just acting crazy and savage all of the sudden until her appearance change..."He couldn't said all the way.

Lin saw Nagisa's eyes,he felt pity against the poor bluenette.He told Nagisa to calm down.Eventually,Nagisa managed to calm down but he fainted.Lin looked closer on Nagisa.The others though he was a creep until he spoke up.

"He is not dead,his heart is still moving.He mostly fainted because of all the things that happened unexpectedly."Lin explained.

*Timeskip*
The two demon slayers went back to the head quarters,they informed their new master Oyakata Kazuto.They informed about the bluenette's mother becoming a victim to Muzan's little experiment.Their master told them that they had to go to a high school considering that they were all homeschooled but still,they were smart as hell.

Time passed by,Lin was greeted by his younger siblings.A white haired calm boy called Shiro,a white haired girl called Shi,a black haired shy boy called Kuro and also a black haired girl called Kira.Lin was about to enter his room until he got surprised to see a green haired girl,wearing a sexy black lingerie.

"Oh you have returned my Black Reaper-"before she could finish her sentence the door was slammed closed,hard enough to let everyone hear.

"Alright may I ask,who the fuck gave her the keys to my room!?"Lin shouted.

"Sorry Nii-san/Oni-chan"the replies were heard.

"Alright Haise,Aira.You two better have a good explanation"Lin said.

"Alright me first"a white and black haired boy said(AuthorsNote:Imagine Haise from Tokyo ghoul,and also for the girl with white and black haired)

"Alright,you better tell me a good reason Haise."Lin said as an image of Death appeared behind him,making Haise scared.

"Uh...Because your single?"Haise said as he chuckled,only to get a hard smacked in his head.

"Now your turn,Young Lady"He said as the killing intent was now higher.

"Oni-Chan,You've never been in a relationship before.I was trying to hook you up with someone I know.I though you were getting lonely"she said with tears forming in her eyes.

"You know what,I yearn for true gender equality"he said as he also smack her head.

"Are you all done with the drama"a black haired girl said with rounded glasses said.

"What drama?"a white haired girl with glasses said.

"What the hell is going on here?"A boy with messy black hair said.

"Seriously?It's the sixth time in these weeks now"a black haired girl with messy hair said.

"Can these day go any further better or worse"Lin thought.

To be continued....