Disclaimer: Naruto + Demon Slayer - I own neither
Story Start!

It was horrible to be alone.

"Man... sure hope a cute girl would show up... might kill some of this boredom."

*CLANG*

Uzumaki Naruto, son of nobody, lived alone at the edge of a village where nobody visited him. He smiled to himself sadly.

"... I should have killed that man." Naruto spoke as he gazed up at the dark sky. He smiled to himsellf when he recalled his encounter with the black haired teen, another wandering samurai like himself. He shoved his arm back into the orange sleeve of his black and orange kimono, keeping the chest open to show his bandaged stomach. "... or maybe be killed by him." Naruto didn't know the skill of the man.

He was a ronin.

He had no master anymore, so he just travelled. He was a wanted man in some places, and hailed as a hero in others.

"Please sir... it's almost morning... may I rest for the day?"

"A girl... seems the gods have blessed me." Naruto grinned as he saw a strange girl, peeking out from behind a tree. She was an odd beauty, with shoulder length white hair, unnaturally moon pale skin. It was brought out by the fact that she wore a blood red kimono that covered most of her small body, with a black fur collar.

Naruto reached up and touched the three whisker marks on each of his cheeks when he looked at her face, and saw she bore two red bars on each of her cheeks. She had white and red eyes... but not in the semi-normal way. The whites of her eyes were red, and the red was white, and there was no light to her eyes.

Also, she had horns.

Lower 4

"Please sir... put away your katana... I mean no harm... I just wish to stay the day, for a meal... I am deathly afraid of the sun."

"With how pale you are, I bet you've never seen the sun... sure thing, go in." Naruto didn't mind her strange, and honestly kind of creepy appearance. She was still on the cute side, so she would make great company. She kept her eye on his katana though, with a glint of curiousity or fear in her eyes. Naruto drew his sword and stabbed it into the ground. He gestured to the home he was borrowing, and he looked at the girl. "Got a name there?"

"It's... Mukago."

"Uzumaki Naruto... do you have a family name?" Naruto asked the woman, and she passed by him and entered the house. He could see the sky was starting to brighten slightly, showing the sun would be in the sky soon enough. He stood up and followed the girl into the building, and she was standing in the darkest part that the sunlight wouldn't touch.

She looked at his katana that was stabbed into the ground.

"I do not."

"So... what brings you here?"

"I'm hungry... and running away from some people... who would want me beheaded."

"Hah... a pretty head to behead." Naruto laughed as he sat down, and looked at the kettle he had boiling with water. Mukago kept her eyes on him, and she looked at the sword that he left stabbed into the ground again. She licked her lips, slightly drooling as she looked at his chest muscle, and his unique blond hair. "... you must be very hungry. If you want, I can go kill something for breakfast." Naruto offered her.

She gulped when she saw how his throat moved when he talked.

"Would you?" Mukago asked. "Would you feed me?"

"It's nice to talk with a cute girl, so I don't mind... as long as you aren't a demon, and you're actually talking about eating me that is." Naruto laughed at the notion. He looked at her, and she recoiled back in shock.

"How-"

"You're cute, but you have horns... and nobody I've ever met has tattoos in their eyes. I'll be back with something for breakfast." Naruto stated as he walked out into the sunlight, the sun had rose on them while she stayed in the house. He drew his sword and walked off into the forest, leaving Mukago alone inside of the house to think about it.

She licked her lips.

'He isn't wearing a Demon Slayer Corps uniform... and that isn't a nichirin sword, so even if he cuts my head off, it won't kill me. I was attracted by his scent... but he seems very confident... I don't know how strong he is-' Mukago changed her thoughts when she noticed he was alreading walking out of the forest with a beheaded bear over his back. She had barely been in her thoughts for more than a few seconds, and he was already back with prey. She sat down and patiently waited for him to prepare the bear for cooking. '-... I shouldn't risk it right away. I'll kill him and eat him in his sleep.' Mukago smiled almost maliciously when she had her plan.

Humans had to sleep eventually, and she couldn't tell how strong he was since she lacked such ability. She didn't want it to become a drawn out battle that would leave her in the sunlight. She saw him join her in the house half a hour later with bear stew, and passed it in front of her.

"It stinks, but it's good on the stomach... a bit heavy for breakfast." Naruto noted. "... you know... I got my name because I was born in the village of Naruto, and I can swim across the Naruto Straight... I could even swim through the Naruto whirlpools... but getting those Naruto oranges made it worth it." Naruto joked with his name.

"O-oh really." Mukago didn't know how to respond to that.

He showed weakness seconds later.

"You see, this spiral..." Naruto showed a large circle on his kimono, but near the bottom of the circle was a spiral. "... the village of Naruto gained the spiral in their seal from the whirlpools, and I swam through those whirlpools... thus I took the name for myself... and my last name, Uzumaki... was taken from those whirlpools." Naruto grinned at his name.

Mukago nodded her head, and she ate the breakfast he made for her. She looked at his sword that was stabbed into the ground outside again. She looked at him, and he seemed so comfortable around her.

"Do you know... what demons eat?"

"Never met one before, but the rumors say they eat humans... so that would make me your favorite food." Naruto confirmed that he knew the rumors, and she looked down at the stew he gave her.

He was WAY too comfortable around her.

'He might be too strong... but he smells... so delicious... eating him would make me grow so much stronger. His blood smells delicious... his muscles are lean and tight... the nutritional value in his body might even push me into the Upper Moons.' Mukago thought, her fingers twitching as she ate. She had the urge to eat him, but she didn't want to do something that could end up with her out in the sunlight.

Dead.

"You want to eat me... you can try anytime you want. I'm not going to judge you for wanting to eat me, I must look delicious." Naruto laughed as he lifted his thumb up to his mouth, and slowly sank his teeth into his own flesh. He drew blood, and Mukago flew into action when the stronger smell of his blood sent her into a frenzy.

He grabbed the front of her kimono and flipped her over his shoulder.

In a split second the battle was over when Mukago saw herself flying towards the sunlight, her eyes widening in fear. She stopped short when a hand grabbed her ankle and pulled her back, pushing her back into her seat. Her heart was pounding, and she saw Naruto was laughing at the top of his lungs at her. She wiped the drool from her mouth, and returned to eating the stew he made for her.

"I... apologize."

"No worries, I figured you would do that. Made it very easy to predict your moves... but I will say you moved much faster than I expected. You must be pretty strong... well... not that it matters, I still won and spared your life." Naruto saw that she was much more submissive in her body language. She gulped and looked away from his eyes, and looked where she could see the sunlight touching the ground outside.

That moment of near-death cleared her thoughts instantly, and even if he barely reacted to her in speed, she didn't want to risk another attack during the day.

She would kill him at night.

"You wish to attack me at night now... if you want, you can... but I don't suggest it. After all... you don't know if I can kill you or not." Naruto leaned forward and forced her to stare into his eyes. She jerked back slightly when he said that, and he just laughed at her. "... who knows, maybe when I sleep... I'm able to fight just as well when I'm awake." Naruto hinted to her.

He laughed as he finished his breakfast.

He leaned up against the wall and just fell asleep right then and there, as if testing her. She gulped and looked at him, he fingers twitching to kill and devour every part of him.

-The Next Night-

She didn't attack him.

'What if he is right... what if he could kill me in his sleep... I don't have enough information... I shoudl observe him more.' Mukago thought. She would stalk her prey and wait for the perfect time to strike. She followed him closely as he walked through the forest, carrying all of his belongings with him. She was hungry, starving, but the human food that he fed her at least allowed her to not attack him blindly.

Her fingers itched to sink into his skull from behind.

Could she kill him?

She didn't know.

She needed to know she had a 100% chance of winning.

-6 Months Later-

"Ah." Mukago fed Naruto with a soft smile on her face.

She had been travelling with him for 6 months, and she still didn't know if she could kill him or not, or if he had some kind of hidden power. She would sneak off when he slept, eat a human or two, and return before he woke up so that she could keep observing him. Sometimes he was upset with her, and sometimes he was fine with what she did.

So, she ended up only eating the humans who smelled like blood, those who killed people, because whenever those were the humans she ate, he seemed to be fine. If she ate any human who didn't smell like blood, he was upset with her, refusing to talk with her.

"So, is tonight the night you're going to attack me?" Naruto covered his mouth while chewing, so he could talk.

"I might..."

That night, she attacked.

She attacked.

She attacked him again.

Then he counter attacked, and she was left screaming at his attack.

Then he grew tired, thanks to her endless demon stamina.

So she attacked again while he was tired.

She didn't stop attacking.

"Wow... that was... something." Mukago was left feeling VERY satisfied from her meal. She laid back and rubbed her belly.

"It really was... you are a demon."

"I am." Mukago saddled her naked body right next to Naruto's nude form, a thin sheen of sweat covering him. She took a deep, satisfied breath and got a a nose full of the scent they left in the air with their battle. '... maybe... maybe...' Mugako thought as she bit her lip.

She could keep it a secret.

It might work, maybe she could do it so that she could meet up with him again... and start a different kind of relationship. One that wasn't hunter and prey. Mukago knew that the Upper Moons could turn humans into demons by giving them blood, since they had some kind of special permission to do so.

"Naruto..."

"Hmm?"

"Sorry." Mukago stabbed her hand into his side, and she injected copious amounts of her blood into his body while wrapping her other arm around him. She didn't know if it would work, but she wanted to at least try. If it didn't work, she would eat him, and if it did work, she would be forced to abandon him for the moment.

Naruto gasped in shock.

"What... the hell... grrr." Naruto growled in anger and pushed her off of him.

"Sorry... we'll meet again." Mukago grabbed her clothes and ran with them, leaving Naruto behind and in agony to watch her run. "... if you don't survive... I'll make sure we become one, and we can be together forever." Mukago promised him, before she kept running even faster, and soon enough she was gone.

She left him.

She came, and then she went.

"... At least... this wasn't boring." Naruto grinned and forced himself to smile through the pain. He gasped and struggled, grinning even wider as he did his best to resist whatever painful thing was happening inside of his body.

He passed out.

Chapter End!
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