LOVE Over DEATH

I'll start my Story summary by Introducing This girl Named Samantha, a 20 year-old girl who lives her life, do things with her own like more than enough to satisfy and be contented with everything.
Everything was perfect until one day, she came to meet this wierd guy name Sebastian, who knows nothing but being alone and aloof with everyone else.
At first she doesn't care about him at all, then the story turned disastrous when suddenly a man who's calling himself Azrael, came talking to her and saying that he must save Sebastian for not to kill himself.

"Say what?! Who the hell are you to talk to me things like that and telling me that I have to save that wierd guy?!"
Said Samantha in a little screaming way.

"I won't be here telling you this if it wasn't you that was chosen to do this thing!"
The man said as an answer to Samantha's question.

Everything went black in the sight of Samantha, now, she doesn't know what to do.