Ninja-Fangirl-Hunter's Big Book of One-shots!

(Black Butler)Sebastian x Fem!Reader

He waited, sitting on a rock in a clearing of the woods for someone. It wouldn't take long for her to show up, she was always on time. He looked up at the sky, thinking about her. That soft, silky H/L H/C hair, those cold and malicious E/C orbs that turned fuchsia once in a while, those beautiful curves that fit her body perfectly, that gleaming S/C skin, how soft she was when she touched him, caressed his body. Although he knew how toxic she was, soft and warm on the outside, cold and dead on the inside. Merciless, calculating, sadistic. Oh how he loved everything about her. The little smirk that hung on her lips, the little move of her hips when she walked, the precision and skill with everything she did. Oh how she was perfection. He should have known better, but it didn't matter to him anymore. He had fallen in deep, and he knew that he was captured, like a fly in a web. He should have been worried, knowing what she was. But, he wasn't, he was content with her, no matter how fucked up his idea of 'happy' was.

You see, this man made a contact with the beautiful demon, Y/N, second in command of hell. In exchange for his soul, she would help him both kill, stay undiscovered and survive until she was satisfied with the number of kills he made. He was a serial killer, a good one at that. He's never been caught, but that's all thanks to Y/N.

At first, he had seen her has a slave, nothing more then a pet he could order around, until she got annoyed. With the fuchsia eyes, she had demanded respect, she was Lucifer's number 2 after all. She was no ordinary demon,and she didn't have to hold up her end of the bargain. From that time on, after seeing her strength and power, he knew she was higher up the scale then he was, but after she treated him like ab equal, a friend.

It came no surprise when he had fallen in love with her, like mortals before. Demon's were intoxicating and unnaturally beautiful. It was not uncommon. What was, was when she returned to feelings. Demon's normally don't care about those they hold a contract with, only caring about the soul.

They were so in love, it was amazing. Like some kind of drug, he couldn't get enough of it. It was like they were made for each other. They laughed, the kissed, they killed. All was right. He no longer cared that she might take his soul, that this might be some sick game to her. He loved her, which was something that he hadn't thought possible. Y/N was his everything.

"I see you're thinking. What about?" A silky voice whispered in his ear as a hand was placed on the small of his back, and another in his raven black hair. He snapped out of his daze, turning to look at the beautiful but dangerous woman beside him. He smiled up at her, both his hands gripping her hips and bringing her down onto his lap. Y/N chuckled softly, wrapping both arms around his neck.

"I was thinking about you." He muttered softly, his rare crimson eyes meeting E/C ones. Ne nuzzled into the crook of her neck, kissing softly. She was so addictive, her skin soft and smooth and just so kissable. Y/N chuckled once more, kissing the side of his head.

"You're too adorable Sebastian, now why did you want me here? I know there has been something on you're mind beside kissing me, so what is it?" She asked, and he almost scolded himself. Of course she would figure it out, she was a cunning demon after all.

Sebastian had been thinking about a way to stay with her forever, so he wouldn't die and she wouldn't eat his soul.

"I want you to turn me into a demon." He replied, and as soon as the words left his mouth she tugged on his hair away from her neck. Concern flashed through her face, her eyes wide and a frown tugging at her lips.

"You don't know what you're asking. You don't want this. Trust me-" She started, trying to convince him. Although he just cupped her face to stop the talking.

"I do want this. I want to be with you, forever." Sebastian explained, and her face suddenly went hard. She shook her head. "I refuse to do so. I'm not going to let you ruin your life." She hissed at him, her tone cold. Why was she being like this? What did she mean? Spending eternity with the one you love didn't seem horrible.