Promise of a Lifetime

Disclaimer: I don't own Kuroshitsuji and the characters. I'm just borrowing them for fun, just like everybody else.

Summary: Instead of a master, Sebastian serves a mistress, Lady Celia Phantomhive. SebastianOC, obviously.

Chapter One: Sebastian Michaelis

My name is Sebastian Michaelis. I am a butler and a demon.

I served under a young lady by the name Celia Phantomhive. She is the last descendent of Phantomhive Family, an underworld crime fighter family who work for the Queen herself. When her parents assassinated by some unknown enemies and died, Lady Celia was kidnapped and sold to Occultists. She had to go through a living hell for a month being tortured and humiliated. She was only ten years old when she summoned me. By our contract, I will have to abide by her command and protect her life until her goal is reached.

Really, a part of me doubted her. What was a girl like her can do in this cold and harsh world? Soon, I was proved wrong by her actions. She actually turns her life around, with a little help from me, of course. From a spoilt little girl that I'm sure she is before the incident, she had become an adult trapped in a child body. Life has forced her to become an adult before her time. Lost innocence is probably one of the factors that changed her.

She restored Phantomhive family's reputation and led the business left by her parents. She really studied and worked hard to preserve her 'kingdom'. Many people were eyeing my young Mistress in disbelief, envy, admiration and sometimes irritation. I have lost count of how many times I have to save her from people who tried to do harm on her, simply because she gets on their nerves.

Lady Celia is very confidence with herself and sometimes she does acted too arrogant in people's eyes. In a world where woman is supposed to be second (except the Queen herself), my Mistress is seen as a threat to many men who felt their pride were beaten by a girl. And it is not helping that she has the Queen's support and trust. Lady Celia also carried her family duty to the Queen and often involved herself in fighting crime in underworld, something a young girl should never indulge in. But my Mistress does not care of people's opinion of herself and she is truly loyal to the Queen.

My Mistress, Lady Celia, is now seventeen years old. She has blossomed into such a lovely young Lady that I'm sure has catch many gentlemen's eyes. However, unfortunately, my Mistress is already engaged to Sir Anthony Audrey. The engagement itself was arranged by my Mistress's deceased parents long time ago.

Sir Anthony is deeply in love with Lady Celia ever since they were kids. However I couldn't say the same for my Mistress. She didn't seem interested much in him or any men at all, not romantically. Or I should say she feared intimacy, probably due to the one month she was tortured and violated. She didn't like it when men took advance at her. I am probably the only man ever allow to get close with her.

I smiled fondly as I remembered when she was still a kid. She used to have lots of nightmare and can't sleep alone. She always ordered me to stay by her side until she fell asleep. Nobody knows about this. If anyone knows, they would think it is weird and inappropriate so I make sure no one know. Her weakness only I should know, see and feel. Lady Celia is quite stubborn and refused to show weakness to everyone and especially to me but sometimes she could not help it. After all she has only me who know and understand her loneliness and pain.

I remembered the first time she shed tears in front of me. It was shortly after the contract between us was made. Her first order was to massacre the Occultists who captured and tortured her. After that, she acted cold and difficult toward me but I knew what she needed the most at the moment was comfort. And as her new appointed butler, I should anticipate her needs and decided to offer my comfort.

When I embraced her small body, there is a moment of hesitation in her as if she wanted to welcome it but felt it would shatter her too. She ranted and demanded to be released. It was only after I told her that she needed the comfort gesture for now and then next time I wouldn't do it again unless she wanted me to before she calmed down some. I whispered sweet nothing into her ears and gently stroke her back. She started to cry and I picked her up and walked out of the massacre scene.

After I re-built the mansion as ordered by my Mistress, she surprised me by started to ask to study business and politic and anything that should not interest a child especially a girl like her. She also met the Queen to assume her family duty and started involved with various investigations into underworld crime. To my surprise and admiration, she actually managed to pull herself together and be what she needed to be in quite short time. However since she was still just a kid, there were moments when she breaks or fell and I would be there to pick up the pieces or catch her before she truly fallen.

Lady Celia really intrigued me and I am glad that I choose her as my Mistress instead of those Occultists who offered her as my sacrifice. I can't wait for the time when I finally could possess her for good when her goal is fulfilled. Her soul would be mine for eternity.

"Sebastian?"

I blinked and I realized that I have been so lost in my own thought and reminiscence that I didn't noticed that my Mistress is calling.

Lady Celia stared at me, a little annoyed, and sighed. "It's rare to see you actually lost in your own thought…"

I apologized and bowed politely at her. "I'm sorry, my Lady. What is it you want me to do?"

"I said I want you to refuse invitation to that creepy Viscount Druitt's party."

"Again?"

"Apparently he can't take a hint…"

I grinned at what my Mistress said.

Viscount Druitt is quite a Casanova in England and apparently is very interested in Lady Celia. Unfortunately, my Mistress is absolutely despises him and his bold advances that according to her is very much disgusting. A few years ago, when we're investigating the murders of prostitute, Viscount Druitt was involved in selling girls in black auction. He, who at the time didn't recognize my Mistress' disguise as a poor girl, actually groped, kidnapped and sold her in his black auction, three actions that forever marked him in my Mistress's black list.

TBC

A/N: This is my first time writing fanfiction. I know the story is all talk and no…conversation. Just bear with it. I hope you could still enjoy reading it though. Please kindly leave a review of what you think of the story. Btw, I look it up, "Ciel" means Heaven so I give my OC the name "Celia" which also means Heaven. See you next chapter…probably.