Much to Ciel and _______'s displeasure however, Sebastian is more... Let's say, "chummy" towards _________, often complimenting them and doing their usual tasks for them. Being incredibly "nice" to the servant.
"You're creeping me out man, can you like- I dunno, Kindly fuck off a bit?"
"Apologies Miss/Sir(?) , it's simply amusing to be around you..."
"Kaaaay??"
The demon butler took his time as he spoke to the servant. Leaning a little too close for comfort "What are you doing little one?" The demon leaned down and whispered into their ear. They didn't even bother answering him, instead he opened their mouth and pressed it harshly against his. Biting at their lips with his fangs, and puncturing a wound. But the servant was more than confused by this and pulled away quickly. ______was staring at the butler with their mouth gaping open- blood dripping down their lips. Their cheeks were bright red. And their fists were clenched, their knuckles turning white.
"What the hell?!"
Sebastian's eyes darted between theirs, searching them for something, but Sebastian isn't sure- he doesn't know what. The servant watched and found a small smile playing on the demon's lips and the servant furrowed their brows looking at the man with a confused look...
Sure enough, like Ciel- Sebastian couldn't even compose his thoughts around her. He craved them. He craved her their. He desired their touch. Sebastian took two steps forward until _______'s back collided with the wall behind them. The demon placed his hands on either side of their head, boxing them in. "Shhh." He let his face move closer to theirs, lips teasing their neck, running them gently along the soft delicate skin. Sebastian was testing Them. He moved his lips up their jaw and let his mouth sit right in front of theirs. _________ parted their lips to try and speak and Sebastian watched as their eyes flitter back and forth between Sebastian's as ________ peered up at the demon through their lashes in confusion and apprehension. The demon finally caved and pressed his mouth on theirs. Once their lips connected, it was like the ever efficient butler lost all trace- amounts of self-control he had left. The demon's hands trailed under their uniform, feeling every inch of their body hidden by their blouse. ________'s hands tried to push against his shoulders, but the devil would not budge.
"I need you," Sebastian grunted into their mouth.
Their kiss was far from sweet, however Sebastian didn't think otherwise. As he slammed his hands onto the wall behind the servant, growling lowly as he speaks.
"Ah ________, rules and positions can be so confining, don't you think? Sometimes, it is in the forbidden that we find the most pleasure. Won't you humor me a bit?"
He chuckles, a hand reaching out to gently brush a strand of hair behind their ear. "This your way of seducing me..??? I mean I dunno if I mind or not cuz hell I'm confused but..."
Sebastian's eyes gleam with a mix of amusement and desire, his voice dripping with seduction.
"Oh, ________, you can try to resist all you want, but there's no escaping the inevitable. The tension between us is palpable, and I can sense your curiosity, your longing. Let yourself indulge, if only for a moment."
He closes the remaining distance between them, his hand gently resting on the hard wall, effectively trapping ________ between his body and the hard stone. His voice drops to a husky whisper.
"Tell me, ________, have you ever wondered what it would be like to surrender yourself to pleasure, to let go of all inhibitions and experience the forbidden ecstasy that awaits?"
________'s breath hitches as they feel the heat radiating from Sebastian's body, his words tempting them further. _________ struggles to find their voice, their mind clouded with a mixture of fear and uncertainty.

YOU ARE READING
That Butler, Isekaid (Modern!Reader Insert)
FanfictionBOOK 2, OUT! (More or less Discontinued) Dropped into the fantastical and horrifying world of the hit Manga series by the great Yana Toboso; Black Butler! One cannot help but wonder... What adventures shall await you...? Black Butler Reader Insert...