Here's chapter 1, its quite fluffy, love a bit of fluffiness!

I don't own bleach.

Warnings: Lemons, violence, angst, language.

Chapter 1

Nii-sama

6 months before…

Rukia trotted towards the dining room, cursing as she went. It was ten past eight, and she was late for dinner, very late in Byakuya's book and this is an inexcusable thing. She was breathing hard from her run over to the Kuchiki manor, having previously been in the living world with Ichigo. She had made him promise to remind her to leave at seven so that she could get back and get ready for her prestigious dinner with her brother, but of course, like the baka Ichigo is, he had forgotten and now Rukia was screwed.

"Baka, Ichigo!" She cursed under her breath.

It was the fall at the soul society, not that Rukia had time to notice, but if she had, she would have noticed the leaves dressed in their royal colours and their crispness when trodden on, sounding like a whole symphony of crackles.

Aizen, Gin and Tousen had long left the soul society, leaving them to prepare for the upcoming war the winter after this one coming. That was it, it seemed. Just a little over a year to prepare for the fight of their lives. During this time, head captain Yamamoto had wasted no time in extra training and getting the current captains to help train Ichigo's friends, especially Inoue Orihime. Rukia allowed herself a little smile as she sharply turned a corner, leading towards the dining room; she had grown fond of the sweet red headed girl over the last few months. She however wasn't the only one she had become fond of recently. She blushed and thanked Kami that there was no one around to see. She sighed in relief as she saw the dining room door looming ever closer; however she also feared her Brother's reaction when she would stumble through the door muttering apologies and asking for forgiveness.

As she reached the door, she skidded to a halt and waited a few minutes to catch her breath. She knew Nii-sama would be not amused, far from it in fact; he would be mortified that she looked so rough, like the commoner she was. Her hair was windswept, her Shihakusho was dusty and she was still out of breath, not exactly lady like. She crossed her fingers; hoping he would be light on her punishment, or even better, not punish her at all. She sighed, like that would ever happen.

She closed her eyes as she slowly as she opened the door as gracefully as she possibly could. She was hoping that her graceful, noble entry would reduce the blow somewhat as Byakuya would, hopefully, see how hard she was trying to be the noble lady she should be. She slipped inside quietly before taking her place opposite him at the large oak table. Rukia kept glancing up at him, breaking the gaze which otherwise was upon her placemat, which wasn't particularly interesting as she had seen it for fifty years now, a change was seriously needed.

"Where have you been, Rukia?" Byakuya cut across the table, making her jump, as he had not moved in the past five minutes.

Rukia felt the electricity cut through her as they made eye contact. The table was large, separating them by quite a distance as table go, but even this far away she could feel his secret zealous self. She shuddered; she had noticed a change in him lately. Since being saved from death and the soul society was currently at a more peaceful time, he had had more free time and unbeknown to her, he had been interested in her. He had been less cold to her of late, more talkative and she had even seen him smile, albeit small and lasting only a second. She had also noticed which was most worryingly of all, her feelings towards her 'brother'. She had become aware of his body, broad and muscular, not that she saw him much but she had seen his thin night robe over his chiselled chest, and she was attracted to it. Rukia Kuchiki was attracted to her brother. The way he walked, strong and dignified, his smell, pungent and striking, his gorgeous face and body, teasing her whenever she was near him and she could only dream of tasting him. The very thought of him made her weak at the knees.

She shook her head; she shouldn't think like this, he was her brother, not some kind of lover. And yet she could shake off this deep feeling she was having, it was desire, lust even, not love. She would never allow herself to be in love, especially not Byakuya. She had heard a drunken Rangiku, which was often, ranting on about how men are asses, and how they fuck you up. Rukia hadn't taken any notice; she liked the men in her life, Ichigo, Renji, Uryu and Chad, then there was her captain and Sentaro and especially Kaien when he was alive, she could say she was in love then, a feeling which was similar to the one she was feeling towards Byakuya. There were the rest of the male captains and Izuru and all the men she knew in the living world and the soul society, they had never 'fucked her up' nor were those men asses towards her. True Ichigo and Renji made fun of her sometimes, but that was just their way. And now there was Nii-sama, a man whom she had an unhealthy attraction.

"Well?" He prompted after a while, making her jump again as she was deep in thought.

"I'm sorry Nii-sama" she apologized profusely, "I was with Ichigo in the living world and I didn't realise the time…I'm sorry Nii-sama…truly sorry…"

"Do what you will," he replied icily as he stood up and walked away. Rukia gazed down at her lap but watched out of the corner of her eyes. She was struck by his stride and passing body, so powerful and mysterious, the fact that Hisana was most likely to have seen him unclothed last made her shudder but it did little to stop her from wanting the same thing as her sister before her. She sighed inwardly, Hisana was his first and only love, and he would never love her or feel anything for her. She was a fool, she still denied being in love, but recently she had felt all these confusing emotions towards him, unfathomable and alien to her.

As Byakuya passed her he kept his eyes fixed upon her, drilling his vision into her and never wanting to look away. He loved her raven hair, desperately wanting to run his fingers through it. He loved her violet eyes, full of the lust for life. He loved her outgoing, hyper sometimes, personality. She wasn't afraid to speak her mind and she would always stand up for the things she believed in, the people she loved and for herself. He loved her body, she is petite, as was Hisana, yet she isn't fragile or weak like Hisana was, Rukia is strong in her own right and doesn't fall easily. He also loved her voice, calming and collected yet loud and reprimanding at the same time, a good mother's voice, to speak motherly and strict at the same time to keep them in place, and also a voice that he longed would call his name in ecstasy in a state of rapture. He knew it was wrong but he held such desire for his little butterfly that he no longer cared about the boundaries of the adoption and her being his 'sister'. They weren't blood related so it wasn't incest was it? She was the sister of his late wife, no relation what so ever, so why did it feel so wrong?

He continued out of the dining room and smiled inwardly as Rukia sighed behind him, she was expressing emotion, probably anger at his cold behaviour, which made him smile to himself all the more as he imagined her mad face. He made his way to his chambers, desperately wishing that Rukia shared his chambers rather than sleeping half way across the manor.

Upon reaching his room he lay on the grand bed and stared at the ceiling, running the day events through his mind. A usual day at work, do some paperwork, scold Renji for screwing something up, meeting some new recruits and giving his cold hello's to them, and now Rukia being late, which was the most exciting thing to happen today. His thoughts turned to the cause of her lateness, Kurosaki Ichigo. His fist involuntarily clenched at the thought of him and his butterfly together. He knew that they were friends, but was their friendship just so, or was there a stronger relationship? Where they lovers? Did Rukia have a boyfriend already? He shook his head, he should be her boyfriend not him and the possibility that Ichigo had gotten there before him as it were made him clench his teeth and feel anger which he hadn't felt since Hisana passed away. The thought of his inexperience hands running roughly over her made his blood curdle.

He sighed, that was another problem. He felt like he was being unfaithful to Hisana, their vows were, until death do us part, but he still felt like he was betraying her, especially since he was lusting after her little sister. He knew that it was silly, Hisana was long gone and he should be happy but it just felt wrong. There wasn't a shadow of a doubt that he didn't love her but she was so like Hisana, and so different. Was his love merely love for Hisana but redirected towards Rukia because they were similar? No he did love Rukia, her carefree nature and spunky behaviour. It had taken him a while to come to grips with his obsession with his sister. At first, like the callous man he was, he had brushed it away, he did not fall in love, not since Hisana, his love had died with her.

But over the following months he was realised he had softened somewhat, he had stopped punishing her for her reckless behaviour, her curfew was getting later and later and he no longer pushed her to be a proper noble. Of course he did command and instruct her when she was particularly un lady like at the dinner table or when she was running around like a blue arsed fly but that didn't stop him from wanting to instruct her at other times as well.

The problem was, when Byakuya Kuchiki fell in love, her fell in love. He wasn't one to fall head over heels quickly but when he did, it was dying, unbelievable and mind-blowing love. And his love was directed towards Rukia, his sister.

xxxxxxx

Rukia wrapped her dressing gown tighter around her fragile frame, conserving the heat and keeping herself warm as she walked to Byakuya's room. She cursed the moronic heater in her room, had to snuff it, didn't it? Especially on a chilly night like tonight! All the other rooms were unused and dusty and no amount of blankets and quilts could keep her warm. She was hoping that he was still up; it was eleven so it was late, as she needed to ask him where the spare heater was kept or whether he had more blankets she could borrow. She suddenly shuddered; he would truly kill her for being up this late and for disturbing his rest.

Mind you, he had been soft on her of late, which made her wonder even more. He had been less strict over the past few months and his behaviour could be seen as erratic or jumpy in a weird way. Like today for instance, she knew he ate little despite being able to maintain such a body, but today he ate smaller than his usual small amount and it was beginning to worry her slightly. She sometimes felt like his gaze was upon her, staring at her like some kind of prized horse, she also sensed his presence being ever closer to her, like when he checks up on her every night while she is asleep. She only knew this as she had faked being asleep and listened intently as he watched her for a few minutes before sighing and going back to his room.

She was interrupted from her thoughts as she silently slid open the door after she had reached her brothers room. She took a deep breath, her heart beating ten to the dozen as she stumbled across the room to hover over Byakuya's bed. She gasped a little upon seeing him, he sleeps? She immediately rolled her eyes at her own stupidity, of course he sleeps, and he is like every other Shinigami, they all sleep, so he is no exception. But still, she thought she would never see him asleep, she smiled as he looked so peaceful and tranquil. His Kensaikan was out and his hair fell upon his face, making him even more gorgeous and pumping desire for him through her all the more. She shook her head, she shouldn't think this way, he was her brother, all be it sexy one.

"Nii-sama," she whispered, her heart pounding and she could barely hear her own words over the roaring of blood in her ears. She watched him intensely as he slept, she had never seen him so peaceful and at ease. It made her smile to see her brother so.

"Byakuya Nii-sama" she whispered again, hoping and dreading to wake him. He shifted slightly, disturbing his peaceful self, "Oh Nii-sama…"

Rukia blushed and hid her cheeks with her hands, shivering a little from the nippy night air. She removed one hand and bravely slid hers into his, which was outstretched and inviting. She gasped as his hand closed around hers and he pulled her to him. She couldn't resist his movements as his sheer strength overpowered her weak form. Her eyes opened wider and her heart was beating harder then ever. She was pulled onto the bed so that she was kneeling beside him.

Sleepily, he propped himself up on one elbow, knowing full well that it was her but pretending to be confused so that she wouldn't catch on.

"Rukia?" He asked making her jump a little.

"I'm sorry Nii-sama," she said quietly, "The heater stopped working and I wanted to know if there are any spare blankets or quilts because mine aren't thick enough…"

Byakuya shook his head; he smiled inwardly to himself but kept a straight face. He knew where they were kept and which ones were the thickest but this was better; she would have to share his bed, finally!

"There aren't any," he lied as he dropped back to the bed but keeping a tight grip on her so that she was close to him. He smirked to himself, they were only inches apart, and he loved it, he was so desperate to close the gap and taste her for the first time, see if her lips are as soft as he had imagined in all of his many erotic fantasies about her.

"Nii-sama!" She gasped as he pulled her into bed with him, tucking the quilt around the two of them so that they were warm and toasty. Her heart was banging against her chest as she was pulled into the strong arms of Byakuya and she was short of breath.

"You'll have to share my bed if you want to keep warm," he half whispered.

Rukia opened her mouth to protest, but she soon closed it again. Why the need to protest? This was what she wanted, to be loved by Byakuya. She frowned, he didn't love her, and his love was the love of a brother not as a real lover. She blushed as he tucked her head under his chin and pulled her even closer so that their bodies were touching. Her eyes opened wider as she realised that he was only wearing boxers. He had no robe on to cover his toned chest or his strong legs.

"I-I'm too hot," she whimpered into his chest.

"Yes," Byakuya smiled, "You are."

Rukia stiffened; she knew he was agreeing that her temperature was questionable but she couldn't help but think his tone of voice meant something else entirely. Rukia brushed off the feeling as she undid her dressing gown, blushing as she did so as she was only wearing a strappy top and shorts.

Byakuya was beaming to himself; she was in his bed, halleluiah! All his, warm and snugly with him, it was like being on cloud nine, except she wasn't naked, that would have been a very sweet cherry on top of the already very sweet cake. He held his breath as she took off her nightgown and smiled at her innocence of wearing cute little shorts and a top that showed her curves. Oh gods how he wanted to caress her tummy and breasts, how he itched to kiss her for the first time and take her to bed properly. He entangled one leg with hers and heard her gasp. "Wait, control yourself" he cursed himself, he was so desperate for her and yet he couldn't rush into it as she probably didn't even see him like that, he was her brother, even though there was no blood relation and she was only adopted. But still, she's the innocent little sister and he is the perverted older brother. He sighed but gave a small smile as she relaxed in his grip a little.

"Arigato, Nii-sama," she whispered. The very word, Nii-sama, was like a knife that stabbed him every time she said it; he would have to fix that. To her he would no longer be "Nii-sama" but "Byakuya-sama" or just "Byakuya".

"Sleep, Rukia," he urged as buried his head in her raven hair.

"Hai, Nii-sama," she replied as she clenched her eyes shut and tried to sleep.

Byakuya felt her body relax further and her breathing regulate, feeling her warm exhales against his chest, tickling him a little as he smelled her scented hair. He sighed happily, certain that she was asleep, "I want you so much, Rukia."

Rukia frowned a little, she was half asleep and she could already see her dreams, reflecting on things in the back of her mind, but she could have sworn she had heard him say he wanted her. She yawned and shook her head, ok, so he had said that he wanted her but he was probably talking in his sleep and he had meant to say Hisana as he was dreaming, even though, deep, deep down she knew he had said her name. And even if he hadn't meant it, it was enough to make her smile.

She welcomed sleep and let it consume her, in the loving arms of her Nii-sama. Following Rukia, Byakuya soon fell asleep, cradling his beloved Rukia.

Please review, also flame if you must. Hope you like it!

In the next chapter: Rukia has a fall and who is there to catch her? (yeah, i think u guess it...)