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Chapter Text

In the comfort of her soft bed, Yuki Kept reading her medicinal journal. Occasionally, She would scribble some additional notes about some herbs she'd collected on the sides of the book. 

"It's already late, why don't you continue this tomorrow? " Madara spoke, seated beside her and playing with a few locks of her hair.

"I would rather finish it now than leave it for later."

"Hn." he agreed thoughtfully, before leaning near her ear to whisper playfully, 

"What if I tell you to stop?"

Yuki giggles a little at the ticklish sensation of his breath fanning the side of her neck. She slightly turned her face to the side with a grin framing her delicate face, "you can't."

"Oh really?" His eyebrows slightly rose in mock surprise, "and why is that?"

"Because" she hummed, turning her attention back to her book, "it's my room. And you must listen to me here."

Madara smirked. Yuki would sometimes play this little game with him, and it never failed to amuse him.

"Alright princess, please continue with your reading."

While the unsuspecting girl drowned herself in her work, Madara simply watched her. It was night time and the light of the huge lamp beside her bed made her skin glow. He took notice of how beautiful her face looked at the moment. Her eyes downcast, the long lashes casted a shadow onto her cheeks. 

He watched how her expressions changed from time to time.

Slowly he found himself focusing on her plush lips. His eyes watched how they parted from time to time. Even better, she would gently chew her bottom lip when she was confused and would dart out her small pink tongue to soothe her lip. 

. 

. 

. 

The way her tongue licked her lips, he felt a strange shiver travel down his spine. 

Every time when she used to leave those small pecks on his lips, he had the chance of feeling the warmth of those lips on his, and he would imagine prolonging the contact, even somehow get her to part those lips, to let him taste her mouth, to push his tongue inside her and devour her. Sometimes his fantasies would go even further, he would imagine pushing his dick inside that pretty little mouth and watch her suck him off. 

He started to get hard. 

Shit. 

Shaking those vulgar thoughts out of his head, Madara decided to focus himself with something else. The reason he came here was to peacefully spend some time with her. Battles and missions kept him and Izuna busier than ever and he knew she felt lonely as of lately. He had a hunch she might be annoyed at them, for this time their mission lasted for more than 8 months and they missed her birthday as well.

Madara knew the hour was very late, probably not appropriate as well, but he wanted to see her. Therefore, he came to her room.

But instead of talking to him, she immersed herself in this task. It seemed like she didn't want to talk to him.

Maybe she's really annoyed this time.

He still remained seated beside her. Watching her as she continued scribbling her notes. 

His eyes lazily hovered over her body, this time checking out the nightgown she was wearing. It was a short knee length white chemise, a popular clothing choice amongst girls her age lately. 

It suits her well. 

He assumed this one must be her favourite, because she was wearing the same one an year ago. Evidently, it was getting smaller on her. Yuki had gotten taller and her figure filled out much faster than he'd expected. She appeared more like a woman now. 

It was a fantastic choice of clothing... to seduce a man. He liked the colour of it; All White...So pure, and so easy to stain. 

As she laid on her stomach and swinged her legs up from time to time, the cloth rode up her thighs. 

His eyes moved towards the milky skin of her thighs. Sometimes, he'd feel a deep urge to squeeze that soft flesh. She'd definitely gained some healthy weight now, especially around her thighs and... 

His gaze slowly crept up to her hips where she'd filled so deliciously. His hungry eyes now glued to the way her back arched. He felt a slight irritation at the nightgown for keeping it covered. 

. 

. 

. 

A small devilish grin appeared on his face.

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Yuki jerked at the sudden tickle on her waist. She quickly looked at her brother to find him picking up one of her book placed on the bed. 

She resumed with her reading, only to feel another tickle on the side of her left thigh. Again, she looked at him, to find him going through the book with a nonchalant face. 

She knew it was his doing.

The girl rolled over to her side to face him, studying his expression.

"I know I'm handsome, but you need not stare at me." He smirked.

"Why did you tickle me?"

"I didn't."

"Yes, you did!"

"I didn't." Madara repeated calmly. 

She didn't buy it and continued staring at him. 

. 

. 

.

Though he was trying his best to keep a straight face, Yuki could see the struggle in his eyes to burst into laughter.

"Stop tickling me nii !"

"Wasn't me."

"It was you."

"I told you it wasn't me." He replied with a smug smile on his face.

A little pout formed on her lips. "Admit it...that it was you."

At this, Madara leaned down to bump his forehead against hers, making their nose brush. He didn't speak for a moment, simply lost in those beautiful gray eyes of hers. So innocent, and so gullible. 

"What if I don't ?" this time his voice felt deeper, and darker, "What will you do hm? Princess?"

Her eyes twinkled mischievously.

"I bet you won't like it." She took his face in between her hands and leaned up, and before he could do anything to prevent it...she did it.

She bit onto his right ear and her hand got hold of his face, to pinch his left cheek. 

The moment she bit him, Madara felt a strong sting of pleasure down his spine. 

Before in the past whenever she'd performed this childish trick, he would always push her away. He used to find this action of her really annoying back then. And he'd thought she'd already stopped doing this. 

But today...He couldn't deny how good it felt.

Finally, Yuki freed his ear, "Told you, you wouldn't like it." She knew how much this annoyed him, and couldn't wait to relish the momentary annoyance he would display.

Madara looked at her with a defeated smirk, fooling her into thinking that she won.

“Always, so childish." he gently tucked her hair behind her ear, away from her face. 

The look of defeat on her brother's face was such a rare occurrence. Yuki grinned ear to ear, making up her mind to boast about this to Izuna. 

But to her surprise, Madara pulled her closer into a tight embrace and placed his face close to her ear, "Is that the best you can do? Such a pity."

His tone was teasing. Yuki could tell he found her actions amusing rather than irritating, and it annoyed her that he's winning!

She was about to retort but his next action surprised her. Madara brushed his lips against her neck, as if to tease her before he bit onto the tip of her ear.

Her entire body shivered with a strange sensation.

"Ah! Nii san! That's unfair!"

A tingling frustration bubbled inside her. She knew madara was smart and now he was beating her in her own game! She could not let it happen. She would not let him win!

She gathered up her strength and started tickling him all over.

With every passing second he found himself losing his own grip. Yuki seemed to notice it, but she saw it in a different perspective ;as innocent child's play — one that she must win.

. 

. 

. 

He finally let his guard down. She was now on top of him, straddling his lap and was moving too much, almost as if riding him.

Little did she notice where exactly she was seated. 

Madara gritted his teeth, finding himself in a difficult situation as his manhood painfully throbbed. The feeling of her hips grinding onto his dick was too stimulating. 

Suppressing his groan, he squeezed his eyes shut and shot his head back at the sensation of pleasure.

"How does it feel to be defeated huh, nii?" She was teasing him. He would have found this mocking most annoying in the past.

But now... 

He wouldn't mind her teasing him every night. 

She was no longer a child. He could feel it as her shapely hips kept grinding onto him. His hands slowly crept towards them, fingers twitching to grip at her plump bottom. 

"Yuki... Ugh! Stop."

But she was just as dense as before.

*giggle * "No! You started it. Now face the consequences nii!"

He wanted to squeeze her ... Touch her, explore her, feel her. He wanted to be inside her.

Finally, he gave in to the temptation, grabbing her and forcing her to fall over onto him. The next moment Yuki found herself trapped in his arms.

Soon he buried his face at the crook of her neck. She let out a squeal when she felt his teeth digging into the skin of her neck. 

“No! That's cheating!” 

As per her knowledge, they were still tickling each other.

But for Madara the game was long over. His mind was way too hazy with lust to think anything straight.

Soon she felt his warm tongue at nape of her neck and a suction, 

"EHHH! NII SAN!! ...STOP...STOP! " She giggled harder. It pained a bit to be honest, and it felt... Weird. 

"Do you accept defeat?" His voice cracked a bit.

"No." She replied, trying to get out of his grip.

"Then, there is no way out." He rolled over, with her underneath him and attacked her by starting to tickle her waist.

Yuki was squirming, giggling, crying and struggling underneath him, but he showed no sign of stopping. He was tickling her everywhere; waist, neck, underneath her arms, collarbone...slowly his hand made way to her stomach. He slightly squeezed her soft belly with his palm, licking his lips at the thought of her swelled and round carrying his seeds. 

She was so lost in the game that she didn't even realize when Madara parted her legs— allowing him to land between them.

"NII SAN...PLEASE PL-PLEASE ... NO ...N-." Yuki squealed and giggled.

At the moment, all he could feel was bliss. He was hard, very hard. And this position allowed him to plough her warmth, even if over the clothes, it felt divine. 

"Unh... " he gasped, feeling the heat spread throughout his body. He found it hard to focus his thoughts as the feeling of her warmth consumed him. He couldn't help but wonder if this felt so good, how heavenly would it feel to be actually inside her. 

He inhaled her scent and he found it so erotic. Lust enveloped him, but he held onto the last straw somehow, trying to NOT screw his innocent little sister right here, on this bed. 

Madara knew what he's feeling was sinful... Abhorrent. As her older brother, such filthy thoughts were unforgivable. Somewhere deep in his mind he felt disgusted at himself for taking advantage of Yuki like this. 

But he couldn't resist this. Resist her. She fit so perfectly between his embrace, so beautiful and innocent... Such a lovely maiden. It was as if she was born for him. 

And this only strengthened his desire to claim her.

"Ah!" *giggle* "nii san! Stop." *giggle * "I-I give up!" 

She panted heavily amidst her giggling. "Stop! I give up!"

His eyes travelled down her face, towards her heaving chest and he noticed something - her nipples were hard. He could see the outline poking through her nightgown.

A low growl escaped his mouth and he pressed himself tightly against the warmth between her legs, upon which she let out a gasp. 

Madara knew she didn't understand any of this. But he did. 

He leaned down towards her face, tempted to kiss her, but instead proceeded to lick the beads of sweat gathered at the nape of her neck. 

Yuki let out a squeal at the tickling sensation and started giggling again. 

But soon she started feeling hot. A strange heat coursed through her body, and she could feel the tips of her breasts tingling, even her pussy tingled and dampened. 

“Un! Nii I feel strange...” she'd meant to utter those words normally, but a strange moan passed her mouth, and she blushed at the slip. 

“I know.” Madara pressed his boner right against her damp panties, earning him another sweet moan from her. 

“But it feels good, right?” 

Her cheeks flushed with an adorable shade of pink, and she slightly nodded. It did feel good, even though it was kindof ticklish. But something felt... Off. Why was she feeling so hot? 

His fingers found her thighs, and she giggled at the feeling. This time the tickling felt... Different. It built a strange pressure withing her, akin to when she wanted to pee, but not quite alike. 

Scared that she might pee herself right here, she tried to push Madara away.

"Nii... Stop!" 

But he didn't. 

"I need to go... Um..." she whimpered, too shy to say it aloud. 

"Where?" 

"ah!" she squeaked when his warm hand rubbed her belly. It felt so strange, yet so good that she could feel butterflies blooming in the pits of her stomach. 

These feelings confused her. She'd never felt anything like this before and didn't understand how to respond or... Should she even be feeling like this? 

Without even realizing she let out another moan. 

So sexy. 

If only she could see how aroused she looks right now. Madara mused. Her forehead and neck smeared with sweat, her face blushing, the way her plush lips remained parted as she gasped for air. He could feel how wet she was even through the clothes. All his poking and humping must have stimulated her to get this wet and ready for him.

So sensual, like a woman in heat. He could even smell her arousal- the musky scent of her heat. 

He roughly kissed her neck, inhaling her scent as he made up his mind to ravage her tonight. He wanted to ram his dick into her wild abandon, while she moaned out his name like a wanton little whore. 

He would taint her tonight. And Mark her as his own. 

. 

. 

. 

. 

.

. 

. 

. 

"YUKI! "

A sharp gasp and the loud sound of her name brought both Madara and Yuki back to their senses. 

Madara swiftly tore himself off of her, And Yuki quickly sat up on the bed to find a shocked wide-eyed Izuna standing at her doorstep.

Chapter Text

He had nothing on his mind. Tired eyes emptily gazing at the mass of flesh beside him.

With every passing moment, these features seemed to become more visceral, more jarring, more grotesque to him.

Before, when he was drowned out by the blood pounding in his ears and the frenzied adrenal rush, nothing seemed to matter more than the pleasure he felt in the moment.
But now that the pounding had halted, the blood no longer bubbled within him. Off of his high of pleasure, all that was left was an intense, inescapable revulsion.

Izuna felt as if he was descending into a bottomless pit.

He shook his head almost imperceptibly, trying to get a grip as the pressure began to build behind his eyes. The lack of sleep was taking a toll on him now.
He got out of the bed, putting on his clothes as he strolled towards the door.
.

.

.

To those acquainted with Izuna, his adherence to routine was well known. He seldom strayed from his usual routine set for each day.
One exception, though, presented itself.

More than often, he would find himself unable to sleep.

He was restless. It was as if something was pricking into his consciousness, keeping him awake, wanting him to delve into it. And so he finds himself staring blankly into the night sky while leaning against the frame of the open door.

The first time he noticed her as a woman had made him question his own sanity. That incident had stirred something within him. He started to take notice of his desires that he’d hidden away in the depths of his mind. 

 

[Flashback]

One day, following a vicious reprimand from his father, Izuna had had enough and decided to cool off his anger before heading back to his quarters.

As usual, he ended up near the same grand old tree near his sister’s compound. He had so many memories around this tree.

Izuna recalled fondly how, after his rigorous trainings, he would often spot his mother seated beneath the shade of this tree, and he would run to her. He loved it when she would caress his hair while he rested his head on her lap.

Sometimes, she would bring their toddler sister along. He didn’t like Yuki’s presence there. As a child, he felt Yuki was annoying. He wanted mother’s undivided attention, but all it took for Yuki was to cry to snatch that away from him.

She was allowed to cry.

On the contrary, Izuna was always punished for any signs of weakness he showed. Some days, when his wounds ached and pain seemed unbearable, he would end up crying, only to get scolded for showing weakness.

“Be a man. Don’t cry like a girl.” This was drilled into his young mind.

So he couldn’t stand Yuki and her crying. She was weak.

As he grew older, his mindset and perspectives towards a lot of things changed. He understood the differences he as a man and Yuki as a woman had to face.

He started caring for her, felt protective of her. He wanted her to be safe and happy. All the feeling a loving brother would normally feel.

But he knew deep down in his heart that was not the only reason why his behavior towards Yuki had changed.

He felt something else as well. A strange attraction he couldn’t quite put a name. He couldn’t deny the fact that he found her attractive… like a man would find a woman.

Although he didn’t understand this feeling, he knew for sure this is the wrong kind of attraction he had towards her.

.

.

Just when he decided to head back to his room, he heard the sound of a door opening and Yuki slipping out of her room.

Izuna managed to surreptitiously slip into the shadows of the tree, watching what she might be up to.

Yuki looked intoxicated. He noticed the girl groggily stagger out of her room towards the direction of the bathhouse.

Strange.

Soon, just as he had expected, her legs gave out, and she fell to the floor because of lack of balance.

The girl somehow managed to pull herself up to sit on the floor.

“Yuki?”

Yuki lifted her head up, her eyes hazy. Her entire body felt feverish. The wine that Madara had made her drink before had left her unable to move or think properly.

Izuna walked up to her, and couldn’t help but notice the way her thin nightgown clung to her body. He could clearly see how hard her nipples were. 

“Nii san?” Yuki had intended to sound normal, but it slipped out strange.

She felt so uncomfortable, feeling her underwear moistening and the strange tingling in her nether regions; she couldn’t help rubbing her thighs together.

Yuki’s expression and demeanor reminded him of a woman in heat. She looked flustered. The same kind he had noticed in women during sex. Flushed cheeks, half-lidded eyes, trembling frame; the way she rubbed her thighs didn’t miss his eyes. It was clear she was aroused.

Though a lot of questions swarmed around his mind, he decided to help her up first. He quickly picked her up and carried her towards the bathhouse.

Yuki hid her face against his chest. Her trembling subdued. 

“Who gave you this wine?” Izuna asked. His jaw tightened. He knew Yuki couldn’t get hold of this wine from father’s compound. This was a special preparation and could instantly lift libido. She was not even allowed to have any wine, as per his knowledge.

“I…didn’t have any,” Yuki lied. There’s no way she could tell him what Madara had done.

“I can smell it in your breath, Yuki.”

A jolt of chill passed through her spine and Yuki couldn’t help the whimper that escaped her mouth. Her legs twitched in response, unable to handle this heat anymore.

Yuki clutched his Yukata and pulled herself up a bit, readjusting herself such as to press her face against his neck. “I need...something...My body feels so hot!” she whimpered brokenly “Please h-help me Nii-san”

Izuna felt uncomfortable. This felt too intimate, even for him. He could feel her breath hitting the side of his neck, and her chest pressed against him. He felt her fingers tracing the back of his neck towards his hair rather inappropriately, but he didn’t complain and kept moving.

Once he reached the bathhouse, he let her down and decided to call her maid. He could feel his hard-on tenting his pants. Ashamed of himself, he decided to move away.

“Don’t go…” Yuki grabbed onto the sleeve of his Yukata. She felt so vulnerable and didn’t want to be alone. 

“I can’t stay here!” Izuna scowled,“Just look at yourself! It’s inappropriate.”

Yuki didn’t say another word and let go. She was well aware of her unkept inappropriate appearance. Her thin white nightgown clung to her curves due to sweat and her undergarments were showing. “I-I Don’t understand this strange s-sensation” she cried out, embarrassed. When she had clung onto Izuna before, she had felt her entire body tingle as his warmth embraced her.

Izuna noticed how lustful her eyes looked at the moment and the way she held his hand, her other hand trembling while slowly rubbing her thigh, hesitatingly trying to guide it between her legs.

Izuna gritted his teeth. No doubt this was that damn wine. He and Madara used to take it at times, especially if they intended to visit any brothels. They were used to its effect and could easily handle it, but he was sure for Yuki, this must be too much to take. 

He quickly pulled away his hand “Cold water would help for now. Get in the tub.” Izuna knew he shouldn’t be near her right now. Yuki wasn’t thinking straight, and he didn’t want her to do something she might regret later. “I will send in Hemiko” he glanced at her one last time, “and inform Nanako to provide a remedy.”

He doubted if she will remember any of this the next morning. 

Probably not. 

Yuki looked too intoxicated to him. She might remember parts of this events, but definitely there’ll be blanks in her memory. 

He left the bathhouse without looking back. 

That night Izuna couldn’t sleep. 

[Flashback ends]

He knew for sure who gave Yuki that wine.

To think the entire time his brother had been grooming Yuki. Even though he knew....he knew something was not right between them, yet he ignored it.
He intentionally distanced himself. To hide his own disgusting side.

Soon, he heard the sheets rustling and a frown marred his face.

“Tora-san!”

He didn’t need to look over to know the source, but narrowed his eyes anyway.

A young woman walked over to his side, her kimono barely covering her chest “What worries you? You barely had any sleep.”

“Nothing that concerns you.” Izuna replied, a bit irritated than he had intended.

Kiriko couldn’t help the sadness the crept up her face. She had liked Tora from the first time she laid her eyes on him. Customers like him were rare in this brothel. And he was not even a frequent one. This would be the second time he came here.

Even though Tora was generally well mannered with everyone, he would often get irritated after sleeping with her. And this bothered her. It made her wonder if her skills were lacking? 

The first time this man had entered the brothel, he had made specific requests. He wanted a young girl with long dark hair, pale skin and soft voice. Which is why she was chosen to serve him.

He had one more request, which he made just before bedding her.

He wanted her to call him “Nii-san”.
This didn’t really unsettle her, because she had known through other girls in the brothel there are clients who come in with such specific requests. One girl even had a client who would tell her to call him Otou-san.
It surprised her how that simple word would spiral Tora out of control. It did something to him, it made him behave rough and angry. And she throughly enjoyed this rough sex.

But today, Kiriko felt surprised for a different reason. She had heard him call out a name.

Yuki…

Is that the name of the girl he is in love with?

“I know you are not this cold-hearted.” kiriko smiled," Yet you treat me as if I disgust you." She reached out to run a finger along his chest, “I wonder why...Nii san~“ 

This time Izuna glared at her. He hated hearing that word from Kiriko’s mouth. It felt...unclean. It made him face his inner demons, his hidden lust for his own younger sister.

Kiriko didn’t have long smooth dark hair like her, her face was nowhere as pretty as hers, her figure didn’t fill out like hers, she didn’t sound like her, she didn’t smell like her, and she didn’t look at him like her.

Kiriko was not his sister. 

Needless to say, Izuna didn’t find her attractive.

His brow twitched in irritation. Kiriko was the complete opposite of what he wanted in a woman.
He didn’t want to admit it to himself, the reason he ended up bedding her again. It was that word...the way she would call him Nii san while he fucked her senseless. 

The entire time his eyes were closed, imagining Yuki beneath him as he plunged into this woman. He imagined Yuki with her legs spread wide open, inviting his dick into her pussy, imagining the tightness he felt around his dick was her pussy milking him. Her moans, her mouth, her breast, her womb, her…

Kiriko knew of his dirty little fantasy. And she would gladly play along just to sleep with him.

A sign escaped him as he slammed his palm to his face. This entire thing was messed up on so many levels.

He felt ashamed of how he ended up seeking out this girl to find relief. Thankfully, this brothel was situated far away from the Uchiha settlement, so no one knew of his true identity.

A part of him wondered if he had consciously looked away from the glaringly obvious truth regarding his siblings all these years because he wanted to hide away from himself? To Hide away his own dirty fantasies regarding Yuki in some unconscious corner of his mind?

“I wonder if this girl Yuki is aware of your feelings,” Kiriko mused.

“How do you know her name?” Izuna almost sneered. 

Kiriko smiled, a shy one that she presumed he would like, “You called out her name today while you released.”

He felt sick. 

He has been feeling sick ever since he saw Yuki pleasure herself, ever since he saw Madara plunge into her wild abandon. He felt sick, yet he couldn’t deny how it aroused him. How the sight of that girl drenched in sweat, her moans echoed in his ears while her face drowned in pleasure. That was not his younger sister he watched that day, it was a woman in heat. 

He hated how it aroused him. He felt disgusted at himself for finding this erotic. 

Abhorrent. 

“Do you want me to help you out a bit here?” Kiriko kneeled down, placing her hand softly on the fabric of his pant, she could feel his dick throb within. “Say, Nii-san? “ She peered at him, trying to appear innocent.

The first time he had used this woman, he had felt horrible. But he soon realized this was the nature of their profession. “Comforting men” was their duty, as the owner had pointed out.

Initially, Izuna thought going for an older woman might be better, but the owner insisted that Kiriko had been enthusiastic in wanting to serve him. In the end, he settled for this girl. She was a fresh girl in this brothel who hadn’t slept with any customers so far. She grew up in here as a cleaner, and made friends with all the whores in here, which is why she had learned how to please a man. But one day, a regular customer had pointed her out as moderately attractive and fit for this job, so the owner decided to switch her to this profession, luring her in with promise of good pay and a better lifestyle. Such was the fate of many civilian girls who were orphaned in young age.

Gritting his teeth, Izuna closed his eyes. 

Kiriko wasted no time and unfastened his pants to pop his dick into her mouth. She was confident in this one skill of hers. 

Izuna could feel her suck his dick,her tongue worked like magic. Once again his mind started imagining it was Yuki’s mouth around his girth. Kiriko gagged a few times, and as she expertly worked her tongue on his length, she could feel him whisper that name again.
Soon he grabbed her head and started fucking her throat while moaning out for Yuki. 

Kiriko felt his tip hit the back of her throat. He was really rough this time. Her scalp ached from the way he grabbed her hair. She had often felt his lust had an element of anger in it. But she didn’t mind. After all, he was a client she must satisfy. She let him grab her hair and didn’t stop him from jabbing his length into her throat. She liked it when he acted this passionately. When his handsome face reflected such raw pleasure. 

Once his rhythm became erratic, she knew he was about to cum. She grabbed his hips and pushed his dick further into her throat while he came.

When he pulled out, she couldn’t help but cough up some of his cum.

Kiriko knew he liked it when she acted like an innocent girl. She looked up to find the man trying to catch his breath and smiled up to him, knowing exactly what to say, “I love the taste of your cum, Nii-san~” and proceeded to clean his dick with her tongue, just like how she always cleaned him once he was done fucking her pussy. As she locked her eyes with him, she saw his face contorting in shame again. It aroused her, and she started to finger herself while cleaning his dick. 

Again shame enveloped him, realizing that in his fantasies these are the words he wished to hear from her mouth. These are the things he imagined Yuki doing with him… like a whore.

He could feel a dull pain in his chest again, the guilt and shame gnawing at him for thinking of his baby sister behaving like this whore...and finding pleasure in this despicable fantasy.

Here it is again…this emptiness.

Every time he did such things with kiriko, Izuna felt empty, and lost. 

In real life, he would never treat his precious sister in such a filthy way. But his fantasies regarding her were debauched to the core. 

He knew this is something he will take to his grave. He will never let her know.
He had made a clear distinction between his reality and his lustful fantasies. They were separate and will always remain as such.

He will always be her brother.

He will always protect her...even if it means protecting her from himself.

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Chapter Text

Warning: Explicit sexual scenes. Dominate male/submissive female.

─∗ ⋅◈⋅ ∗─

Waking up to Yuki’s sleeping face just inches from his own filled Madara with a quiet, unnerving clarity. Her breaths were soft, her lashes rested like shadows on her cheeks, and the early light filtering through the curtains cast a gentle glow over her features, so serene, it made his chest ache.

It had been a few weeks since he’d brought her back from that cursed Senju abode, and still, the fear lingered within him. What if she were to disappear from his sight again?

His hand moved before he could think, thumb brushing gently along the curve of her cheek.

He didn’t need reason or logic to understand it now: he would do anything for her. Anything. No matter the cost, no matter how much it strained or shattered him.

Foolish, perhaps. Pathetic, even. But this reckless devotion felt branded into his soul, an ache he had long since stopped trying to resist.

His fingers slipped into her hair, marveling at how it flowed so easily between them. He hadn’t meant to wake her, only to hold onto the silence a little longer, to this fragile sliver of peace, but the warmth of his touch stirred her from sleep.

Yuki’s eyes blinked open, bleary and slow, and she gave him a sleepy smile. “Mn, is it morning already?” she murmured, voice tired and warm. 

"No. Not yet. Still few hours left."  Madara returned the smile with a gentleness that didn’t quite reach his eyes. He shifted closer, pressing his forehead against hers as his arm circled around her bare waist, pulling her snugly into him. In doing so, his body responded instinctively, his arousal pressing against her stomach, undeniable and awkward in its honesty.

She didn’t flinch. Only glanced at the curtains with a faint sigh. The silence between them lingered, while with slow, almost meditative path, Madara’s hand traced along the curve of her back. Occasionally his fingers brushed the outer swell of her hip, whether by accident or unconscious desire, neither of them commented.

Then Yuki tilted her head, just slightly, like a kitten roused from a dream, gaze still hazy with sleep and curiosity. It was such an innocent & unguarded gesture that it made his heart flutter, traitorously soft.

How could someone be this breathtaking without even trying?

Her parted lips hovered close enough for him to feel the warmth of her breath against his mouth. Her eyes met his, those storm-gray eyes, brighter and softer.

She leaned in and kissed him. Light and innocent. “Is that… okay?” she whispered, her voice tentative, searching his face for reassurance.

Madara didn’t answer with words. He simply pulled her closer and kissed her back, deeper this time, a quiet urgency threading into his touch, something raw and unspoken.

She didn’t know, couldn’t possibly know how sweet her innocence tasted, how much it tore at him. She trusted him, leaned into him without fear, and that trust felt far too pure for the things he wanted to do to her.

His hand slid up along her side, hesitating at the curve of her ribs. He paused, but then his fingers brushed over her breast, thumb grazing her nipple. The soft startled sound she made shattered something in his chest. Want twisted inside him, tangled with guilt he couldn’t name.

Soon her hand drifted down, tracing the line of his abdomen, seeking him out with a kind of uncertain vulnerability.
She didn’t know what she was doing to him or how close he was to losing control. And yet, he couldn’t bring himself to stop her.

So it's like that, huh?

A half-laugh escaped him. “Someone’s feeling bold.”

Yuki climbed on top of him in silence, her knees bracketing his hips as she settled her weight gently onto him. She moved with slow, careful rolls, not demanding, just exploring. Feeling.

Madara simply looked up at her, “Yuki… aren’t you sore?” the lovebites he had given her had turned dark red overnight and looked much bigger. 

He remembered last night too vividly. The way lust had overtaken him, too intense...too much. She had begged tearfully for gentleness, but his mind had gone dark with hunger, and his control had splintered. When he finally came back to himself, she’d been lying there completely spent, marked, filled.

Now, watching her face above him, he reached out and smoothed his hand across her back, as if trying to soothe her.

“If you don’t want to… I’ll stop now.” he murmured, finger tracing her stomach, and pressed his thumb into her belly button, earning him a shiver, "But once I lose control, I am not sure if I can stop."

Yuki's answered simply by leaning forward to lick between the crease of his lips. Madara opened for her, allowing the kiss. 

Tangling their tongues together, Madara used his free hand to gingerly trace his fingertips down the length of Yuki's spine, the light touch having the desired effect of making her shiver. When he reached his goal, he grabbed handful of butt-cheek and squeezed. Startling the girl to break their kiss. 

Madara stared, his heart pattering when the bed-tousled girl above him simply gazed into his eyes. She appeared so sensual, so enticing. He let his gaze drop down to her wet heat between her legs. He could clearly feel her warmth in this angle on his lap, and smirked recalling how she had rode his dick like a girl in heat last night.

Yuki was already on the move, the effortless downward slide making him question for the umpteenth time if she loved taking his dick in her mouth. He didn't say a word and merely watched her. Yuki let out a barely restrained moan, eagerly sucking the head of his dick.

The girl languidly slid up and down with relaxed lips and lapping tongue, one hand gripping the base while the other cupped one of his bulging ball in her small palm. He made a conscious effort to keep his grunts in check so that he could listen to her soft intonations, like music daintily playing from an ornate music box.

Soon he moved his hand to her head, trying to hold her in place to take more of his length into her throat. When Yuki took him all the way in and held it, his member swelled, relishing the way her throat muscles contracted on a swallow, heightening the blood flow to his nether regions.

Yuki dutifully swallowed him down to the hilt a few more times before easing off. Her mouth wide open and allowing his dick to flop back heavily onto his stomach with a wet splat. Panting, she moved back into her position on top of him, humping and rubbing her wet heat against his dick.

Madara gripped her hips firmly, both hands sliding down to cup her ass. He kneaded the soft flesh with slow insistence before delivering a teasing slap that echoed lightly through the room.

"Ah!" She yelped out, startled, as heat bloomed across her skin.

A smirk tugged at his lips. He leaned in, his voice low and commanding. "Shh, be a good girl. Here, suck it." 

He forced two of his fingers between her mouth. The girl began sucking his digits, tongue snaking fluently between the fingers while her eyelids hung heavy.

Madara watched her entranced, possessive heat coiling in his gut.

When he finally withdrew, the wet digits left a sheen across her kiss-swollen lips. He traced them over her lower lip, slow and reverent, smearing that heat across her skin like a mark, wondering if he should try something different today. Something he knew only the most submissive partner would partake in.

“I wonder,” Madara murmured, voice low and rough, “if spit would be enough.”

His eyes roamed over her, every inch of her flushed and trembling under the weight of desire. She looked utterly wrecked by need and the sight ignited a possessive part of him. If she was this eager, she might as well surrender completely.

He hadn’t done this before. Not something so… unconventional. But the thought of pushing past boundaries, of claiming parts of her no one else had touched, stirred something primal in him.

“For what?” Yuki asked, blinking at him, breathless. “I’m already so wet.”

So innocent. So unaware of the filth that flickered behind his eyes. The words by her were spoken with genuine naivety, and that only made his hunger worse.

She had been raised like porcelain: refined, delicate, taught to carry herself with grace and dignity. Obviously, she would've never even imagined such brutal, nasty ways of carnal pleasure.  
Just the thought of such a naive and pure girl like her, submitting to him, taking his entire length in that little untouched hole of hers ignited a dark feeling within him.

Well, she would find out about it soon, from him. And Madara had no intention of holding back. 

He snaked his arm around her waist, and other moved towards her ass. Upon pressing his forefinger against the rim of her bum, Yuki frowned and angled her hips upward, urging him to get into her pussy. Madara simply smirked, "Stay still, dear."

"But that's not-AHHH! "

He pushed into her hole, gaining entry against the tight clench. Just as he had expected, he encountered tight resistance, but it didn't stop him from entering. He kept fingering her, opening her up slowly, patiently, enjoying the way she flinched and gasped.

It didn't take long for her to grow accustomed to having a foreign object up her ass. And soon, Madara was privy to little whimpers as he steadily slid two fingers in and out. Yuki bucked in rhythm with him, her expression caught between ebbing discomfort and confused pleasure.

"I-Ah! Nii, not ther-AHH!" The girl trembled, "I need it in my pussy!" She whined in desperation.

Madara kissed her again, slow and unhurried, like he had all the time in the world. Then proceed to trail down to the curve of her jaw. “Tell me, Yuki,” he murmured, his voice rough with need and something darker, “how does it feel here, hm?”

Yuki gasped, her breath catching as her body arched into his touch, even as her cheeks burned red. “I-It’s so strange…” she stammered, squeezing her eyes shut. “I don’t like this. It’s… it’s dirty.”

That only made him chuckle, low and amused, the sound vibrating against her skin as he nuzzled the side of her neck. “Are you sure about that?” he said, voice dropping to a whisper. His free hand slid slowly down her back, his arm pressing her closer. “Because your body is telling me a different story.”

His fingers moved with purpose inside her, and Yuki instinctively curled closer to him. Her breath hitched again as her hips tilted forward entirely on reflex.

Madara exhaled a sharp breath against her throat. “See that?” he whispered, lips brushing her skin. “See how tightly you are clinging to me, love? I barely move, and you squeeze around me like that.”

Yuki bit her lower lip, her brows knitting in a mixture of frustration and overwhelming sensation. “S-Stop saying things like that…”

He grinned against her neck. “Why? Is it turning you on?”

She gave a half-hearted glare, but her body betrayed her again with another involuntary roll of the hips. Madara’s hands tightened at her waist, holding her in place.

“You’re so sensitive this morning,” he whispered, “I barely touch you, and you’re already squirming.” 

"I want y-your thing in my pussy!" She cried out shamelessly, frustration and need etched into her face.

“Look at you… aching for more like you didn’t spend the whole night crying on my cock.” he teased, shifting slightly beneath her. 

Yuki pressed her forehead to his shoulder, hiding her face as her nails dug into his back. He could feel the heat rising between them, the tension winding tighter with every breath.

“Such a naughty girl,” he growled softly, “Without even touching your pussy, it is dripping all over me.”

Yuki didn't protest and Madara couldn't be more over the moon. Everything he did, his little sister responded perfectly like they'd been meant for each other. She would submit to him, to please him. To think they both share the same blood yet differ so vastly.

"AHH-Nn! But!" A moan escaped her. "That's not how you make babies!" she blurted, prompting Madara to muffle a laugh against her throat.

“This one’s purely for pleasure, sweetheart,” he growled, voice low and dark. “Your pleasure...” he leaned in, lips brushing her ear, “of being claimed in ways only a submissive little slut like you would beg for.” and he shoved in a third finger, prompting Yuki to jolt harshly. Tears gathered in the corner of her eyes, unable to process the shame and thrill of it. 

Madara placed his free palm on her belly, rubbing it in slow circles, the thought of bending her over and drilling into her pussy was tempting, but her squirming in need when he denied her was even more tempting. "You want my cock in here, don't you?"

"Yes!" She cried out. Her flushed cheeks and fluttering eyelashes injected Madara with deep obsessive possessiveness. Not for the first time, he wanted to keep her all to himself, to lay claim to her moans and the flicker of her pink tongue between those pretty lips forever and ever. 

“You look better like this,” he murmured, voice dark and soft. “Tamed.”

He drove his fingers into her clenching hole faster and soon she gave in to the pleasure, her expression turned into unfiltered bliss. Madara bit back a strangled sound. If that's the face she pulled now, what would she look like when he properly fucked her in the ass?

He kept drilling his fingers inside her tight hole, making her open up, her back arching and face turning even more salacious, savoring every twitch and mewl he coaxed out of her until without warning, the girl promptly dropped her head onto his shoulder, her teeth tearing into the flesh of neck. Madara tilted his head slightly, his eyes drawn down so that he could watch his fingers drilling her little hole, and marvel at the desperate bucking of her hips, the sight mesmerizing.

She let out a moan before breathing directly into his ear with ragged exhales, denoting that she was reaching orgasm. His cock throbbed painfully, to think his innocent little sister would feel such pleasure from being fingered in her ass, Madara felt a strong urge to just force his length into this needy hole of hers.

Her gaze at the moment held such lust and hunger in them, it tempted him to tease her even more.

Yuki gasped in shock when he removed his fingers from her tight hole and pushed it past her lips. She looked into her brother's amused eyes, and shivered realizing he wanted her to clean him. Reluctantly, her mouth closed on those fingers that were just inside her, shame enveloping her as she sucked on them. No matter how much she wanted to, she couldn't voice out the words to refuse. Even knowing full well how truly indecent this was, she obeyed, as her mind burned with need and arousal-enough to break her. 

Madara’s dick twitched watching her suck on his fingers, for he knew in the haze of lust his sister complied even to the most obscene of acts. Such an adorable little slut she is.His expression darkened, lust evident in his eyes as he smirked at her, "Good girl." and flipped her beneath him in one smooth motion.

Without a doubt, she belonged to him. His to corrupt thoroughly. He picked up a bottle from the nearby wooden drawer, and poured some of its content over his fingers. Yuki didn't pry and merely laid there panting and waiting, and experienced a full body shiver when Madara went in again, slowly introducing each finger at a steady pace until all three fit comfortably inside her asshole, the cold slipperiness of the gel like substance allowing an smoother slide.

Yuki panted, whining in disappointment as her hips pushed back into Madara's hand with each in-stroke. She couldn't take the ache in her womb anymore, she needed to feel him in her cunt. Without any shame, she moved her free hand to grab his dick and guide it towards her pussy, moaning when the tip of his dick entered.

Madara chuckled darkly. From past experience he knew it'd only be a matter of time before she reached the height of her arousal and cum. Only this time, his greedy little princess was feeling it from her butthole. And he wouldn't let her cum, not yet.

Yuki whined again when he didn't push his dick in further, but instead pulled out his fingers, his eyes dark as he peered over her. "Patience, Yuki."

He wanted to watch her pretty face, to see the kind of expression his innocent little princess would make as he drilled her ass for the first time. He knew it would be painful for her. Yet he was sure she would take it all like a good girl for him. She would endure it, and submit to him.  He wanted it all, her cries in pain, in pleasure, her tears, everything.

Madara rubbed soothing circles on her belly, imagining how it would feel once she’s round with their seed, while trying not to lose control on how utterly debauched his little sister looked at the moment, those flushed cheeks, fluttering lust filled eyes and trembling lips. "Raise your hips for me, love."

Yuki stared at him with mouth slightly open for a second too long before she understood what he meant, a deep blush spread across her cheeks as she obediently got on her knees underneath him on all fours.

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