1 - 20 of 346 Works in Demon Sebastian Michaelis
Navigation
Listing Works
-
The Soul Within The Hourglass by ShadowPreachers for Perpetualsg
Fandoms: Kuroshitsuji | Black Butler
05 Oct 2025
Tags
Summary
Emma Andrich is a twenty-two-year-old university student living an ordinary life—until she suddenly wakes up in December 1888. Time travel would’ve been bad enough, but she quickly realizes she’s no longer in her own world. Instead, she’s face-to-face with Earl Ciel Phantomhive and his unnervingly perfect demon butler.
Desperate to find a way home, Emma clings to the only safety she can find in this dangerous new reality. But when Sebastian reveals she’s his mate, the lines between safety and temptation begin to blur.
Caught between two worlds, Emma must navigate Victorian society, demonic politics, and her own growing attachment to a creature who isn't capable of love. As the days pass, one forbidden question refuses to leave her mind:
Does she even want to go back?*Disclaimer:* English isn't my first language.
-
Tags
Summary
La relación entre Ciel Phantomhive, un joven autista y asmático que le cuesta formar parte de los aristócratas de alta sociedad inglesa, y Sebastian Michaelis, un enigmático y poderoso duque (en realidad un demonio). A través de tutorías solicitadas por el gemelo menor que se convierten por debajo de la máscara de buen humano un cortejo manipulado, Sebastián aprovecha la inocencia y dependencia emocional de Ciel para asegurar su posesión sobre él, y poseerlo como suyo.
-
Harry Potter and the Cursed Wizard by LizaGreen
Fandoms: Kuroshitsuji | Black Butler, Harry Potter - J. K. Rowling
03 Oct 2025
Tags
Summary
Upon hearing of the escape of infamous criminal, Sirius Black, Her Majesty The Queen calls upon a power now rarely used in the modern day world. Ordering her Guard Dog to investigate the matter thoroughly, unconvinced of the legitimacy of the workings of the Ministry of Magic, she wants to be assured that the criminal is found and detained appropriately.
Harry Potter meets a new student while staying in the Leaky Cauldron after blowing up his Aunt Marge, trailed by odd servants and with outlandish ideas. He doesn't seem to want to play by the usual rules of Hogwarts at all.
-
Tags
Summary
Agni offers Sebastian a helping hand in the kitchen.
-
Tags
Summary
When Sebastian is seriously injured by an attack from the Undertaker, Ciel expects his butler's recovery to be swift.
He has never been more wrong.A bond of blood.
A covenant of ash.
The demon falters.
The child endures.
And the dark remembers what it should not.Major Spoiler Warning for post Emerald Witch Arc!
-
Phantomhive - Sebastian/Ciel-Shiori by Chriszephy
Fandoms: Kuroshitsuji (2014), Kuroshitsuji | Black Butler
30 Sep 2025
Tags
Summary
Shiori Phantomhive finge ser Ciel e o único que sabe da verdade é seu mordomo fiel que irá ensina-la a se portar como homem assim como esconder seus seios e sua menstruação.
- Language:
- Português brasileiro
- Words:
- 2,337
- Chapters:
- 1/1
- Hits:
- 38
-
Tags
Summary
When Ciel Phantomhive presented as an Omega, a dark creature rose from the depth of hell.
Of course the young boy didn't know about it, he didn't know anything of what his future had in store for him.
His servants brought him far, far away from his home since as an Omega, it was too dangerous for him to stay there. He shouldn't have presented as an Omega. The entirety of the Aristocracy was already making plans about how to destroy the Phatomhive family, now that a "weak, useless" Omega was at their top. A shame. Embarrassing. Humiliating for the whole Aristocracy.
Ciel had to leave as fast as possible right after his first heat, his loyal servants bringing him to a boarding school where he would be safe for the time being.
An Alpha with pitch black hair greeted him right at the front gates, wearing a dark cloak, a perfectly fitting suit and a neat tie.
Who would have thought that Ciel was greeted by the devil in disguise ?
His fated mate.
Sebastian Michaelis. -
Tags
Summary
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!) -
Tags
Summary
Celia Phantomhive loses everything but the all-consuming need for revenge. She makes a deal with a demon in exchange for her soul, unaware he desires more than just her soul at the end of their arrangement.
But what will this demon do when feelings get involved?
-
Tags
Summary
A fickle maid's curiosity sparks the interest of a well-known demon of the Phantomhive house. What seemed to be an innocent lyric professed in private turned into a wonderous, public, adventure.
Series
- Part 1 of Subcontractual Agreement
-
What's German For Gun Sliencer? by My_JJD_party270
Fandoms: Kuroshitsuji | Black Butler, Barbie: Life in the Dreamhouse (Cartoon)
24 Sep 2025
Tags
Summary
Ken's wrench has been out of shape lately, and maybe Skipper has been up a bit too much, that she's tweaked a bit of the coding awry. That doesn't really matter, not like their invention will grab all of the house members by the scruffs of their necks and drag them anywhere, right?
A loud incorrect buzzer blows.
Ciel is exhausted. Sebastian wants his master to sleep forever so he can play with 'Her'. Elizabeth and Edward think he's got a wife who is of much lower status. Ciel is having fun listening to them, when a giant pink thing drops a yard far from the estate- Language:
- English
- Words:
- 1,439
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 16
-
Tags
Summary
The Queen has figured it out.
She seems alright with it, however, Ciel can't stop thinking something about the whole situation is off.
Even more so as strange things start happening
-
Time After Time by NotAnAuthor1234
Fandoms: Kuroshitsuji | Black Butler, Mary Poppins (Movies)
22 Sep 2025
Tags
Summary
When the mysterious Mary Poppins is summoned to the mansion, Sebastian has troubles adjusting to the new caretaker. They both believe that their way is the best way to care for their shared charge, but as time goes on they start to appreciate each other’s strengths and how they compliment their weaknesses.
However, there is a danger to their blossoming feelings, one that Sebastian may not be able to overcome. With cases of odd and intense déjà vu and the growing issues arising from those who oppose their union, is there more to their story than meets the eye?
-
Tags
-
Tags
Summary
Ciel’s breath caught. He clenched his fists, nails digging into his palms as he struggled to contain the panic welling in his chest. None of this made sense. None of it was right. He turned abruptly toward Lukus, his voice sharp and low. “What year is it?”
Lukus blinked. “Dude, what?”
“The year,” Ciel snapped. “What year is it?”
“Uh… It’s 2023?” Lukus said slowly, concern creeping into his tone. “You seriously didn’t know that?” Ciel staggered back a half-step, his heart thudding in his ears. The number struck him—foreign, massive, impossible, over a century beyond what he knew. The reality settled over him. This wasn’t just another place. This was another time.
***
Ciel Phantomhive, who awakens in the modern world, confused, injured, and severed from Sebastian, his demonic butler. He's taken in by a sarcastic but ultimately kind art student named Lukus, and as Ciel tries to make sense of the future, he uncovers that his entire past has been erased from history.
-
Tags
Summary
A collection of oneshots written for CielSeba Week 2025.
Warning:
This contains bottom/submissive Sebastian & Top/dom Ciel.
-
Tags
Summary
Even after years at his side, Ciel is still learning the limits of his demon’s strange, unearthly body. Fortunate for him, Sebastian is all too willing to demonstrate.
CielSeba Week Day 1: Inhumanity/Shapeshifting/Monsterfucking
Series
- Part 1 of CielSeba Week 2025
-
Tags
Summary
Sebastian makes a mistake and Ciel makes sure he atones to it.
-
Tags
Summary
Walpurgis is a night when the line between the supernatural and humans becomes thin.
What does that mean for demons?
Or the one where the servants find out. Kind of
-
That Butler, Annoyed by WingsOfTheDamned
Fandoms: Kuroshitsuji | Black Butler, Majin Tantei Nougami Neuro
24 Aug 2025
Tags
Summary
Ciel finally managed to get another picture of Sebastian, and this time he made sure to keep both Pluto and the demon himself far away from the manor to see the results
It's not quite what he expected