A/N: I've finally had the courage to post my own stuff so I hope you guys enjoy it. I couldn't resist writing a Sirius romance (since he is the fictional love of my life) even though it's not canon. It's not a happy love story where the two characters fall in love and all is good, even though I happen to enjoy stories like this when they're well written. Anyway, if you know the characters then I don't own them, J.K. Rowling does.

Chapter 1: Promises

"John Kensington's dream was to help people. He believed that every person had to do their part in making the world a better place. Believing strongly in his causes ever since he was a child, John became an example of what an outstanding citizen should be. Not only that, but he was a dear friend, which makes this even harder for me. He was tireless not only in helping others but also in his devotion to his wife Cecilia and his two children, Alexander and Ada. Cecilia was a dedicated wife and mother, always kind, considerate. Her laughter could warm even the coldest of hearts. Her determination was admirable as we all know. We can never forget these two people, or the circumstances in which they died. And although it is cruel that they were taken from this world so young and with so much to give, we must also never forget all they stood for, their honesty, courage and love. We must always remember just like they did, that there are things worth fighting for in these dark times."

It was a sunny afternoon, but Ada would not have noticed. The entire day seemed to be a complete blur; with everyone from their parent's former school friends to representatives of the Ministry of Magic approaching them, many in tears. There parents were very well loved in the community. Not that it really mattered at all. She continued to stare at her parent's grave quietly, still overcome by the shock of it all. It was only three days ago, when her mother had tucked her into bed, wishing her sweet dreams and kissing her goodnight. It was the same night they were murdered. Glancing over her shoulder, Ada saw her older brother, deep in conversation with the wizard who had given the eulogy.

"Alexander?" She said, making her way towards her brother.

"Ada, I want to you meet Professor Dumbledore, he's the Headmaster at Hogwarts. He also taught mum and dad…when they were at school." Ada took a step forward, shaking Dumbledore's hand. This was the man that her father had always spoken fondly about.

"A wise man once said that good men must die but death can never kill their names. I know that nothing that I say will bring much comfort to the both of you now but I promise you that their deaths weren't in vain. Things will get better." Dumbledore added.

"Your right Professor, things will get better." Alexander declared, running a hand through his dark hair. Observing her brother, she noticed his grief replaced by a sense of serenity and resolve. Like he had found a new purpose after what happened. For a brief second, Ada swore she noticed a look of discomfort and apprehension on the Professors face, but it vanished as quickly as it appeared.

"I know that it is a difficult burden for two children so young but I am very proud of how you've handled things Alexander. And I am here for the both of you if you ever need anything." Professor Dumbledore continued.

"I expect I will be seeing you at Hogwarts soon Ada?"

"Next year."

"I'll be looking forward to it." He smiled, facing both siblings "And remember, if you need anything do not hesitate to ask me. I'll leave you to your responsibilities and once again, I am terribly sorry for your loss, your mother and father will be missed greatly." As Professor Dumbledore turned to leave, Ada turned towards her brother once more.

"I'm sorry Alex. It's all my fault."

"Why do you say that?"

"Because if it wasn't for me we could've helped them." She wiped her eyes with her sleeve, turning away from her brother. Ever since she could remember, Ada hated crying, since it always made her feel helpless over the situation. The last thing that Ada wanted was to have her brother think she was weak. She had to be strong, just like him. Seconds later, Alexander pulled her close into a hug as she finally broke down into tears.

"If it weren't for you they would've killed us too." He replied, wiping her tears "I promise that I'll take care of you. I'll make things better. And…and I'll get revenge."

"Revenge? But how?" How would two children get revenge upon the men responsible for killing their parents? It was impossible.

"Look at me Ada. Maybe not today or tomorrow, but someday I'll make them pay for what happened. We'll wait years if we have to but I'll make them suffer, even if it's the last thing I do."

"Can I help too" She asked hopefully. They were her parents too! Why not help Alex?

"Why? I want you to have to have a normal life, this isn't for you. You shouldn't be involved in a situation like this. "

"They're my parents too! I have just as much right as you!" How dare him! Trying to stop her from what she wanted to do. Alex lowered his head, knowing he had lost this battle.

Ada was right. She had just as much right to avenge her parent's death. It wouldn't be fair to keep her away from it. Alexander silently prayed that he was making the right choice by letting her in on his plans. He would never forgive himself if something happened to her. All they had now was each other.

"Fine." He sighed "But you can't tell a soul no matter what. Promise me Ada."

"I promise."

"No one will understand what we're trying to do." After his sister promised he breathed a sigh of relief.

"How are we going to do this?" Ada interrupted. Sure, the idea sounded good and all but they had no clue where to begin, just a name. They have a long way to go if they want to avenge their parent's death.

"Let's not talk about this now. Besides, we have to pack to go to the orphanage." Ada tried to hold back her tears once more.

"What's going to happen to me when you go back to Hogwarts?"

"It'll only be for a little while, and then you'll be there with me. I won't forget about you while I'm gone. I'll always be with you Ada, do you believe me?" She smiled at her brothers, answer. He would never abandon her.

There would plenty of time to plan their revenge, tomorrow was a new day. Today, they would only mourn their parents. And treasure their memory. There will be no tears starting tomorrow…they would think about revenge instead.

Next Chapter: Five years later…the pact begins. How far along are Alex and Ada in their plan? How will it affect their life at Hogwarts?