1 - 20 of 70 Works in Bottom Sebastian Michaelis
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To serve a master, to be amused by volcaninc_crater_lake
Fandoms: Kuroshitsuji | Black Butler
14 Dec 2025
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After Ciel's sleep is disturbed by Undertaker showing up in a dream, Sebastian goes searching for him, to ensure a good sleep for his master. Finding him leads to unforeseen events.
Takes place right after the end of the Emerald Witch arc, so no manga spoiler here!
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They hadn’t planned for a late night in Ciel’s dorm to become anything more than a few stolen kisses, but one careful question leads to another, and the quiet between them doesn’t stay quiet for long.
A Weston AU where Ciel and Sebastian are students, and Sebastian is trans.
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Sebastian is turned into a thirsty, horny slut after a mysterious human showed him a real good time. Now, he seeks that pleasure all the time. There is not an hour of the day where he doesn’t think about his other life- as a man of the night.
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Sebastian is hiding something from Ciel and the later will do everything to discover what it is, whatever it takes. How will our dear demon will react ?
English is not my first language so sorry in advance.
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Ciel Phantomhive’s hold over his devilish servant defies the bounds of their contract. It is an all-consuming obsession, a hunger that will destroy anything that dares to come between him and what is his.
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#9 Skirt Stays On by sinsoftheabyss (horrorsintheunknown)
Fandoms: Kuroshitsuji | Black Butler
25 Oct 2025
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Sebastian couldn’t breathe, his head spun wildly as he hugged the bedpost tightly for support. Not that he needed breath, but the feeling of his lungs being squeezed to the point of popping was deeply unpleasant.
“Okay, okay! I’ll never make you wear a corset again! Can you drop it?!”
Ciel let go of the lace immediately and Sebastian felt an immediate relief as his torso expanded just enough to be comfortable again. His eyes brightened, “Really?”
Sebastian gritted his teeth, “Bastard…”
Series
- Part 9 of Sebaciel Kinktober 2025
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#8 Knife/Gun Play by sinsoftheabyss (horrorsintheunknown)
Fandoms: Kuroshitsuji | Black Butler
22 Oct 2025
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The dagger left his chin, trailing downwards until it met his shirt collar. Ciel teased the fabric with the blade for a moment before making a quick slice down Sebastian’s chest down to his abdomen. It wasn’t particularly forceful, but the sharpness of the blade did the work for him.
Sebastian looked down to see his skin torn open, blood running down his torso as the cut already started to heal itself.
“Does this hurt?” Ciel asked as he ran his hand over the wound, digging in his fingernails to stop it from healing.
Sebastian’s breath stuttered as Ciel prodded inside, “Yes.”
Series
- Part 8 of Sebaciel Kinktober 2025
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“My Lord… I think there's a mistake here.”
“What do you mean?” Ciel asked in response, but that didn't stop him from stripping the man of his pants.
What was he even supposed to say? That this wasn't what he meant? That he, his Lord, couldn't do as he pleased?
No, no and no.
There was no way that was going to happen!----
Sebastian finds out that his young Master wanders into lustful desires and offers his help to satisfy him, but things gets a turn he didn't expect. -
#5 Cockwarming by sinsoftheabyss (horrorsintheunknown)
Fandoms: Kuroshitsuji | Black Butler
13 Oct 2025
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“Permission to speak, my lord.”
Ciel looked down, drinking in the sight of his butler kneeling under the desk, a red collar tightly clasped around his neck which was connected to a leash. Sebastian’s shirt and jacket had been discarded in the bedroom well before they arrived at the office.
“You may,” Ciel said lazily as he hoisted a foot onto Sebastian’s shoulder, digging his heel downward.
Series
- Part 5 of Sebaciel Kinktober 2025
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Sebastian was once the one constant in Ciel’s life.
But what happens when the protector becomes the one who needs protection?
A butler who can no longer obey. A master who no longer commands.Their mission to Denmark was meant to be a political maneuver.
But within the walls of Fredensborg Palace, an old, dark power begins to stir—
and as a prince slowly dies in his sleep, Sebastian, too, begins to deteriorate.
Weakness does not suit him.
Yet his illness can no longer be hidden.And Ciel must take on a role he was never meant to play.
Between dependence and duty, closeness and distance, guilt and desire,
dream and reality, unfolds a game neither of them can win.
(Ciel is of age!) -
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Mr. Sutcliff? by grellsutcliffno1fan for Insertpoetryhere
Fandoms: Kuroshitsuji | Black Butler
19 Sep 2025
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“Your coworkers have begun calling me, ‘Mr. Sutcliff’.”
“Have they now?”
“Tell them to stop.”
Grelle laughed, like the ringing of a bell, a gloved hand placed demurely over her painted lips. “Oh, come now. It’s far too entertaining for that.” She cocks an eyebrow, and it’s an expression, when worn by Grelle Sutcliff, that he has come to dread, “Why, does it make you feel emasculated, Bassy? Would you prefer I take Michaelis, then, when we get married?”Sebastian chokes, “When?”
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Or: Grelle's coworkers have begun calling Sebastian 'Mr. Sutcliff". They fuck about it.
Or: Or: Grelle gets to use her princess stick :)
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Ciel is tired of not being able to fuck Sebastian. He endeavours to amend that. And when one is born with biological limitations, they must get creative in order to achieve their goals.
I don’t mind a little imitation plant-based meat
And you can call me princess
I’ll bow down to your royal harness-Sweet n’ Low, Peach PRC
CielSeba Week Day 7 - Free Day
Series
- Part 3 of CielSeba Week 2025
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A collection of oneshots written for CielSeba Week 2025.
Warning:
This contains bottom/submissive Sebastian & Top/dom Ciel.
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Entry for CielSebaWeek2025 Day Three (3rd Sept): Power Imbalance/Powerplay, Orgasm Denial, or BDSM.
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Ciel slammed a desk drawer, glaring down at his paperwork. “What do you want?” snapped Ciel. “Spit it out or leave me alone.”
Sebastian bowed slightly. “If you desire any assistance with relieving your stress, I shall wait in your room, my lord.”
Ciel paused what he was doing, clearly reading the suggestion hiding under the polite tone. It wasn’t enough to get him to calm down, which secretly pleased Sebastian. “Can you think of nothing but your beastly desires?”
“Yes: your desires.”
“My passionate feelings are not of the loving kind at the moment, Sebastian.”
Sebastian smiled. “I know. Shall I wait for you to join me?”
Ciel stared at him. “You’re in the mood for that? At the drop of a hat?”
“I’m a creature of truly reprehensible impulses at heart, young master.”
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Shortly after his near-fatal encounter with Undertaker aboard the Campania, Sebastian hunts him down in the dead of night, despite still being heavily injured. The subsequent confrontation doesn't go exactly how Sebastian had planned for it to.
Series
- Part 2 of Bottom Sebastian
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Ciel believes education in female biology is useless. Sebastian is willing to make that untrue.
CielSeba Week Day 1 - Shapeshifting
-And I pray thee now tell me, for which of my bad parts didst thou first fall in love with me?
-For them all together, which maintained so politic a state of evil that they will not admit any good part to intermingle with them.Series
- Part 1 of CielSeba Week 2025
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Sebastian makes a mistake and Ciel makes sure he atones to it.
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Sebastian's not one to really talk about himself and on the rare occasions he does, he wouldn't (nor would anyone else) describe himself as "caring". Afterall the whole reason he's here is to eventually consume his young master's soul, that's the only reason you might mistake his protectiveness for genuine care. Everything he does is simply to properly portray "the butler aesthetic". Eventually the young master will complete his revenge, sending Sebastian off to his next contractor. Yes, the occasional fights against grim reapers, bizarre dols, and the avatar of a god, do make serving the Phantomhive manor more memorable and even intresting...but that's as far as it goes. Interesting, that's all it is, there's no such thing as attachment for a demon who experienced centuries pass in the blink of an eye. After all he's known grim reapers and the Undertaker's boredom of immortality... although he himself must admit, meeting a human blessed by a god, isn't something you see every century. It is rather...intriguing.
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After having his true nature figured out, Blavat has Sebastian thrown out of Sphere Music Hall, and having to leave his young master behind. While trying to think of his next move, an unlikely character invites the demon for a tarot card reading.
Series
- Part 1 of Bottom Sebastian