Before you read this story you have to know some thing about it. This is a werewolf AU in which Derek and the pack transform into real werewolves. Another this is that each wolf has a mate or a soulmate. It's something like the imprinting in Twilight. So basically when they see their mate for the first time they immediately know that this is their mate. They become the center of their existence and they could do anything for them. Also they become anything that their mate needs them to be. A sibling, a parent, a friend, a lover etc.

Sooo, yeah that's it. This is just the prologue by the way. I'll upload the first chapter tomorrow. :3

Oh, I don't own the characters. Or teen wolf. Or the imprinting idea (even though the story is loosely based on imprinting)

Enjoy.

Prologue

Soulmate.

A soulmate can be a lover, a friend, a sibling, a parent. Most people believe that a soulmate means a person that you fall in love with but in fact your soulmate is someone that makes you whole no matter what their part is in your life. They are just there, your other half.

Humans believe that there isn't such a thing as a soulmate but in Derek's world they exist. In fact Derek's story begun nine years ago.

He was at the grocery store with his mother because she hated it when she had to go alone so as the youngest member of their family he had to go, even though he didn't like crowded places.

It was pure torture for his sharpened senses and the fact that he was a relatively now werewolf -he had phased for the first time two months ago- he wasn't used to them yet. Of course when he had told her that, she had scolded him, saying that he couldn't spend the rest of his summer locked in their house.

That was why Derek was currently following his mother with a be scowl on his face. Every time someone spoke a little more loudly than normal he would wince and when they passed beside someone who didn't take a bath this morning he would grimace in disgust. Unfortunately his mother found this whole situation rather amusing.

He was grimacing for the hundredth time when he heard someone crying. Normally Derek would wince because if there was something that Derek hated more than crowded places were crowded places with crying kids in them. This time, though, Derek found that he wanted to run and protect the source of the crying.

It was strange and confusing but Derek couldn't stop himself from following the sound. He could hear his mother calling his name but he didn't stop until he found a little boy looking scared. He was the one who was crying.

He couldn't be more than three but he was obviously alone. Derek frowned. His mom would never leave him alone in a place like this. Derek walked towards the kid until he was kneeling in front of him. As soon as the kid saw him, he stopped crying and turned his big, greenish eyes towards Derek. His lips were still trembling and for some reason it made Derek want to cry too.

"Hello, I'm Derek," he said softly and the kid made a confused little noise. "Where is your mom?"

At the sound of the word mom, the boy started crying softly. "Mommy," he whimpered pitifully.

Derek's next move would surprise him if he wasn't so out of character already. He found himself enveloping the little boy in a protective hug.

He couldn't really understand what was the meaning of this. He was still young and his mind couldn't come up with a reason as to why he was doing this. It was an instinct. His wolf was growling that he had to protect this kid with his own life if he had to.

That was the day Derek found Stiles. His soulmate.

So um, yeah. Did you like it? :$