The One || Sebastian Michaelis x Reader

"I would like you to take over this case for me. The Queen insists on my doing it, but I am far too busy with my company and other ventures to be a detective," you explained.

Ciel narrowed his eyes calculatingly. "Why wouldn't Her Majesty come to me in the first place?"

You twirled your hand in a circle. "She had this idea that I would be able to figure this out since it's in my region of business, but I don't know the first thing about detective work and such," you answered.

Ciel nodded. "Agreed," he said, "except there's more to the story than what you're telling me."

You laughed because of course the Queen's Dog would sniff out your ulterior motives. Before you could dig yourself out of the hole that was getting deeper and more treacherous by the second, the door opened and Sebastian strolled in with the tea on a serving tray.

Sebastian placed the tray in front of you on Ciel's desk and handed you a cup. You made eye-contact and raised a brow at the charming smile the butler attempted to aim at you as if trying to coarse you into swooning or blushing, but you would do neither.

Sebastian gave the other cup to Ciel while you sipped from the expensive material. The tea was the perfect amount of rich and sweet to you, making your tastebuds burst to life.

"Damn," you whispered, startling the two gentleman in the room with using such abrupt and almost lewd language for a woman. You simply tipped your head toward Sebastian. "You are one hell of a butler."

Astonishingly, Ciel cracked a grin at your words and began staring at Sebastian as Sebastian stared at you in open awe because he had never had his own words taken by someone who he also had never met. This is when he determined that whoever you were, you were going to pose more of a problem than first anticipated.

"Thank you, Madam," he managed to say in a steady and strong voice with a hand on his chest, giving a short bow.

You sighed. "Please, call me (Y/N) as well. Titles mean nothing to me, even if you are a servant and it is seen as improper."

"Very well," Sebastian replied, then proceeded to swiftly exit the room as if he heard an order that wasn't said.

You got a read on Sebastian almost immediately. He was a demon, yes, that much was apparent, but you could see the facade he put on when behind it all was a creature yearning for the soul of his Master. It was like you could imagine Sebastian stalking Ciel like a lion waiting to pounce on a gazelle, but there was a string holding him back because of the contract.

You, of course, knew about contracts from demonology books you acquired over time. Demonology was something most nobles happened to dabble in since it was the eighteenth century, which was probably why Ciel knew how to summon one at such a young age.

"Do we have a deal then, Ciel? I would like to make it clear, firstly, that I do respect you in every form and would find it a great learning experience to work with you," you said.

"We do," Ciel replied, reaching over to shake your hand. "Sebastian will show you out."

"Pleasure doing business with you. We should get together again to do some investing in newly developing markets. I would love to have you as a partner," you suggested, standing up.

"Likewise."

You headed toward the door where you then left the room, surprised to see that Sebastian wasn't waiting, but you knew the way out anyway. You were descending the steps when you heard a crashing sound and reflexively swung your walking stick up to grip the end of it.

"Baldroy, I'm going to kill you!"

"It wasn't my fault!"

"Don't blame him; we all had a part in it!"

You let your stick rest back at your side and continued toward the door but diverted your path to the ruckus occurring. Standing outside of the room, you listened to Sebastian yell at other servants, which you found comical for some reason. His human facade was slipping, you presumed, and he didn't mind showing it to those he deemed lower than himself.

Suddenly, there were hushed whispers from the room, then the door flew open to reveal Sebastian without his tail coat, white sleeves rolled up to his elbows, and an apron. He looked at you with that charming gaze of his, but you weren't buying into it.

"Mr. Michaelis," you said with a tantalizing smirk, "I was hoping to run into you on my way out."

He didn't miss a beat. "Well, eavesdropping on the other side of the door will lead to another meeting between two people."

You didn't falter. "Snarky, I like it. Maybe you should let that shine through more than your seductiveness," you replied casually.

"Seductiveness?" Sebastian questioned, a smile of his own morphing his lips. "Such forwardness from a lady."

"Do I look like any ordinary lady to you?"

Sebastian pondered your words where double-meaning seemed to lay, but he wasn't fully understanding exactly what you were trying to say.

"I suppose you don't," he said cautiously. "May I show you to the door?"

"No, but thank you," you said, turning around and heading to the exit without so much as a sparing glance.

Sebastian watched you until you disappeared around a corner and he eventually heard the door shut behind you. Baldroy, Mey-Rin, and Finny had left before he went to address you, so he wasn't worried about if they saw him glaring after you.

Sebastian was even more confused than before because, standing in such close proximity to you without any other people, he felt a type of strength radiating from your body; it wasn't supernatural like himself, but pure, human willpower. It intrigued him more than anything, but it was good to know your obvious beauty matched the power you had on the inside.

He went back to cleaning up the dishes that were shattered all over the wood flooring because of the idiots he worked with, but couldn't stop thinking about the words you said since you were obviously hinting at something, he figured out. But when Sebastian swept the glass into the trashcan, he realized a small, key element in the conversation: how did you know his last name?