black butler sebastian x reader

chapter 15- William

-time leap-
You have be working along side lord mau for a few weeks. You had no luck in finding the noble that had been turning humans into vampires.
At the scene of yet another body torn apart by a suspected human turned vampire, you mutter to yourself annoyed that the case is not closed. ~how hard can it be to find one person~you groan. Then you see a familiar face. William, just in time, viewing the cinematic records right now would really help.
As you begin to approach him like you always had in past cases, you freeze knowing sebastian was watching you. How could you explain that you knew him and get William to agree without discussing it with him. You couldn't say you knew since he was human. Before you noticed, sebastian was already by Williams side. You could see their hatred for each other by their body language and death stares. You swiftly intervien "William, I see your already know sebastian. I have a favor to ask of you" Williams cold stare at sebastian eases as he lightly smiles at you. "Lady (y/n), of course I may help you" sebastian stiffened as william said your name, his eyes fleared from hate. You see sebastian discomfort and try to relieve his anguish " I've only known William a few years. He's helped my solve some of my cases every now and again" you shot a glare at William to agree with your story. "Yes, I have only helped this um human? With past cases. Her sincerity is pure and helps lighten my work load by preventing more murders" sebastian frowned " so will you show me the records " he hissed. William chuckled " not a chance in hell will I help you. However I will show (y/n) " Williams pats your head like a old friend that you are. You could almost see the steam coming from sebastians ears as william lightly put his hand on your back, leading you to the body.
William showed you the records and you watched very closely. You made a sketch of the vampires' face. William turns to you and quietly whispers "why are you of all people with a demon. I guess he doesn't know that your an angel. You must be careful. That man is a monster. If he finds out, he'll ahhh I don't want to imagine what he'd do to you. Just please be safe" Williams takes his leave quickly as he has much to do as ever. Sebastian quickly dodges the crowd to be by your side.