(Disclaimer: Derek is still an Alpha and I made up 'the figure' cause I couldn't think of an actual character from Teen Wolf to use, sorry!)

* * * 

You jolt up from your bed to the smashing of plates down stairs. 
You turn to your boyfriend Derek who was still asleep. 
Another plate smashes and you jump at the sudden noise, which wakes up Derek. 
"Whats wrong?" He asks, his voice groggy. 
Another plate smashes and he sits up quickly, "What was that?" 
"I don't know" 
He shifts his body and stands up, "Stay here." He explains. You nod and watch him leave the room. 

You wait a moment until you get up from the bed and open your bedroom door and look down the stairs and see Derek standing at the bottom of the stair case. 
"Can you see anyone?" You whisper. 
He shakes his head and walks across the room towards the light switch but before he reaches it he is tackled to the ground by a dark figure. 

You let out an ear-piercing scream which makes the figure turns towards you and gets up from Derek. 
Derek layed motionless on the ground and you'd give anything for him to get up, but he doesn't. 
The figure begins to walk towards you and it tilts its head to the side slightly, sending chills up your spine. 
It walks up a few steps before it occurs to you that you should probably shut the door, so you do. 
You lock the door and press your back to the wooden door. 
You stand there in silence, listening to its... claws?... scraping the wood on each step as it makes its way up to your room. 
When you hear silence your breath hitches and you begin to tremble. 
"Nova..." You hear a voice whisper, as the words pass through the lips of the figure you feel a slight breeze escape its lips, and that makes you realize that the figure was no longer on the other side of the door, it was right beside you. 
As quickly as you possibly could, you unlock and open the door, making sure you smash the door in the figures face as hard as possible. 

Wasting no time you begin to run down the stairs but trip on your way down, and your body collides with another. 
Expecting it to be the figure you thrash around, trying to escape the grip it now had on you. 
But you stop to the familiar sound of Derek's voice. You open your eyes and are met with this now red ones. 
"What happened, did it hurt you? Are you okay?" Derek asks you, running his hands up and down your back, calming you. 
"No I'm fine" 

The two of you were interrupted by chuckling that was coming from the top of the stairs. 
You turn your body to get a better look at the figure. He looked almost human. Everything was normal accept his finger and toe nails were replaced with long, sharp claws that looked similar to Derek's. 
"She is most defiantly not okay!" He explains, laughing slightly. 
"What are you talking about? You didn't even touch me!" You huff. 
"Oh sweetie, I don't need to touch you for my power to take effect on a human!" He chuckles. 
"Then what do you do?" You ask, slightly curious. 
"My breath is the core to my power." He explains. 
He waits for a moment, watching the two of you before he catches on that the both of you have no idea what he's talking about. 
He sighs, "When my breath touches human skin it lets out poisonous bacteria which seeps though your skin, adding black blood cells to you body" 

Your blood runs cold and you stand there in shock, not being able to move. "So I'm dying?" 
He claps, "Well done, I knew there was a brain in that pretty little head of yours!" 
"Why are you doing this!" Derek growls, stepping in front of you. 
"You don't remember? Here let me refresh your memory..." He takes a few stops towards the edge of the stairs and stops again. 
"Do you remember a girl by the name of Lauren by any chance..." He asks. 
You look at Derek and his body tenses up. 
"... And how you killed her, Derek?" 
"It was a full moon. I couldn't help myself." Derek hisses though clenched teeth. 
"Doesn't matter." The figure laughs. "She was an innocent human Derek!" 
"Where are you going with this!" Derek shouts, making you jump at his sudden outburst. 
"The night after you killed her, a man came to your house, didn't he? And you made a deal with this man. A deal that if you ever dated another human in your little werewolf existence this man would come and take her from you, and by taking her he meant either just taking her or killing her." 
Derek looks back at you for a moment before turning back to the figure, "That man was you, wasn't he?" 
The figure smiles and nods slowly, then raises his hand up and clicks his fingers and he was gone. 
With the click of the figures fingers you felt a severe pain in your back, making you collapse onto the floor. The next thing you notice is your lack of breath. 
"Nova?" Derek shouts, he bends down and pulls you into his lap. 
You feel a sharp pain in your head and you let out a scream. 
"Nova. I know what to do, just try to stay still for a moment!" Derek explains. 
He raises your arm to his mouth and begins to wrap his fangs around your lower arm.
"I'm sorry." He says before biting into your arm.

The pain was unbearable but soon the pain was leaving your body and you were unsure weather what he was doing was saving you or killing you. 
Then everything goes black. 

Your eyes flutter open a moment later and you notice Derek staring down at you.
He lets out a breath of relief, "I though I was going to loose you."
"I'm not going anywhere."
 
* * * 

A/N: Thank you for requesting! I really liked your idea and enjoyed writing it and got a little carried away and made it a little too long haha, I really hope you like it (I was thinking about adding in the part where you become an Alpha too but I think it would take longer and make the imagine longer and I think its a bit too long, sorry!) xx