Disclaimer: I do not own the character (s) or anything related to it, the copyright belongs to Kubo Tite and his people, I'm not making any profit out of them, and only thing that belongs to me is the plot and a bar of chocolate that's being eaten, also the Lyrics of the song 'Viva Las Vegas' belongs to Elvis Presley.

Notes: Well I know that some might find the Byakuya x Unohana odd, but I like them, I blame a certain manga chapter and the amazing fiction I have find about them that made me an addict to it, so I decided to give it a try at writing Bleach fandom, which will be my first start at publishing something.

So sorry for some Occ'ness and such but it's my first try so I hope to improve.

"Domino Effect"

Prologue: Viva Las Vegas

I'm gonna keep on the run

I'm gonna have me some fun

If it costs me my very last dime

If I wind up broke up well

I'll always remember that I had a swingin' time

I'm gonna give it ev'rything I've got

Lady luck please let the dice stay hot

Let me shoot a seven with ev'ry shot

Viva Las Vegas, Viva Las Vegas, Viva Las Vegas

Viva, Viva Las Vegas

The now famous song of the missing Elvis Presley sounded its last vocals in the background of the hotel bar. It was a bit odd to hear that song in the seemingly high-class bar, but the song had become the hymn of the city and it wasn't strange to hear it at least once a day in the famed City of Sin.

However, for him, the notion of hearing the song was so bothersome. He did not find Las Vegas amazing; actually he found it loud and irksome. Currently he was sitting, alone as was his preference, in the bar of their hotel. He was not the type of person who drank because he felt like it, when he did drink it was only because the occasion required him to do so. Right now, however, he needed to drink.

The bartender quietly served him another glass of scotch; his slate grey eyes only saw the pale golden liquid and the crushed ice, which floated in the liquor and from time to time clashed against the glass. He hadn't been at the bar for more than half hour and was on his third glass of scotch; at least he had far better alcohol tolerance than most other people. But that didn't change the fact that he was still in a touchy mood.

Usually he was a cold and distant man, but that day, well, he could very well kill. He was not his usual self, he was extremely angry, and for good reason. Not only was he out of his country, leaving his work neglected, but he was in an irritating city and only because his dear sister, Rukia, had been obligated by her idiotic fiancé, Ichigo, to come here to celebrate their respective bachelor's parties.

Sure he knew that it was unnecessary for him to come, but Rukia had begged him to because Ichigo wanted to somehow bond with him. After all they were going to be together forever now. And Rukia had convinced him, not because of the brother in law bonding thing, but because she had used the same technique that Hisana had so long ago used to convince him to do things he normally wouldn't do.

"Why so lonely?" A feminine voice asked.

His expression hardened a bit, she was not the first woman that had approached him that night, and actually she was the tenth one. But really could anyone blame them, after all he was a handsome man with deep raven hair and mesmerizing grey eyes, but that particular day he was in the mood to cope with no one.

He ignored the woman who had dared to talk with him in the first place. His expression hardened a bit more when apparently the stubborn woman didn't catch the signal that her company was unwanted, or maybe she did but chose to ignore it. The woman proceeded to sit on the stool on his right side.

He had been educated to be a gentleman but right now he was truly pissed, more so with alcohol in his system, so rather slowly he turned his head to the side to regard his unwanted company and order her to leave him alone and stay at least fifty meters away from him but he didn't say anything when he recognized the familiar gentle woman with bright black hair and azure eyes.

That woman was one of the few good things that had come of Rukia's relationship with Ichigo. It was Ichigo who had introduced Rukia to her and he was glad that his sister at least had one older, sensible friend she could turn to.

Unohana Retsu, a doctor and chief of the Surgery department back in Karakura General Hospital, had become an older sister figure to Rukia. The gentle doctor had been introduced to her a year after the death of Hisana and Rukia had quickly adopted her as an older sister. Not that Rukia had forgotten Hisana because, like him, she had not, but she had needed another female in her life and Unohana had been the perfect fit.

"So, what are you doing here?" She asked softly.

He averted his gaze away from her "…Nothing"

"My, my, I take that the party was not that good? You probably got bored and decided that it was better to come here to drown your problems in the bar instead of being there with them" She smiled when she noticed he narrowed his eyes in displeasure "Am I right, then?"

"Since you have so kindly come to the conclusion as to why am I here, I will allow you to guess whether your assumptions are correct or not" He said coldly.

"I am right then" She answered with an even, gentle tone and looked down at his glass "Where are the others?"

"……Back in the suite with…" He didn't finish and instead raised his glass to take a drink.

"The strippers, I suppose?" She giggled softly when she noticed the rather imperceptible flinch on his body "Really men are so obvious. I wouldn't expect them to do something other than see strippers in this kind of party"

He turned to look at her with a raised eyebrow "Pay tell, what did you do?"

"Well, we weren't watching strippers if that's what you're wondering. Actually, Rukia decided something else to do that turned out rather interesting" She answered with a teasing smile "We went to see the show "O" from the Cirque du Soleil back in the Bellagio and right now they are in the casino"

"Excuse me miss" The bartender finally approached "Will you like something to drink?"

She turned to look at the bartender "I will have what he is having, please"

The young bartender left and soon enough returned with another glass of scotch for her. After the bartender left them, a heavy silence fell upon them. Really, there was nothing they could say to each other, after all they had barely spoken and were both the type of persons that will exchange a polite greeting and small talk before going their different directions.

So the only thing they could do was drink and from time to time say something to each other.

Well that's all, it's a prologue and it supposed to be short and I wanted to be this way.

By the way "O" is trademark to Cirque du Soleil, not mine, but if you can go see it do it, it's an amazing experience and I loved it.

Also thanks to Bakageta for Beta this, I really appreciate it, ARIGATO