BadBadz
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Summary
Ciel has lost everything on his tenth birthday and in his desperation, he makes a contract with a demon to seek revenge against those who have hurt him. In return, he will give the demon his soul as a payment.
However, that's not what the demon wants. Instead, once Ciel has gotten his revenge, the demon will take Ciel as his mate, whether Ciel wants to or not.
A. K. A. Retelling of Black Butler with some extra Sebaciel thrown into the mix.
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Written for Sebaciel Week 2026.
Looking at the first year of Sebastian and Ciel's married life. Each chapter will cover different prompts, but all of the chapters are set in the same universe.
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For years, Ciel has refused to celebrate Christmas, but this year, Sebastian reminds him that it's okay to remember.
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It's Halloween and Sebastian is home alone, until someone rings the doorbell late in the evening.
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A collection of oneshots written for CielSeba Week 2025.
Warning:
This contains bottom/submissive Sebastian & Top/dom Ciel.
Recent series
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Demon Wizard by BadBadz
Fandom Harry Potter - J. K. Rowling, Kuroshitsuji | Black Butler
04 Jul 2025
Summary
Ciel and Sebastian's adventures at Hogwarts.
- Words:
- 357,820
- Works:
- 4
- Bookmarks:
- 202
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Summary
Set thirty years after the end of Kuroshitsuji II. Ciel is now a demon and Sebastian is bound to him forever. To alleviate his boredom, Ciel decides that he wants to be a Private Investigator. Not wanting to raise suspicion, he changed his name to Ciel Dalles and together with his eternal butler, he opens Phantom Investigation.
- Words:
- 93,355
- Works:
- 7
- Bookmarks:
- 89
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Summary
A collection of Kuro Morale Events Kinkmas on Tumblr (2023).
Please enjoy and don't forget to leave kudos and/or comment if you like them! Thank you!
- Words:
- 6,155
- Works:
- 4
- Bookmarks:
- 2
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- Words:
- 15,175
- Works:
- 4
- Bookmarks:
- 9
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Summary
Non-chronological collection of stories set in the 'An Earl and His Demon Butler' universe.
Contains oneshots or multi-chaptered stories, depending on my inspiration. They're not really related to one another, but they're all set in one universe.
- Words:
- 230,205
- Works:
- 3
- Bookmarks:
- 50
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After the contract is fulfilled, Ciel falls into Hell — a realm with its own logic, its own language, its own aesthetic, and even a twisted form of tenderness. How do you survive inside a space where humanity is considered a defect, and life must be built anew from the ground up?
No one will offer you a hand. No one will guard your pride ever again. Use Sebastian to reclaim your place.
Bookmarked by BadBadz
07 Aug 2026
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In Ciel’s arms lies a small, writhing lump of flesh. Red, with barely visible eyes, with a big mouth and a big nose, and helpless. It was recently washed of blood, brought it in, and was laid on Ciel’s chest.
A boy, twenty inches, almost eight pounds. A babyboy.
Ciel rocks their child, holding his head and back tightly, and Sebastian hears him whisper, “Hello, sweetheart…”
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A collection of one-shots, linked chronologically.
[Russian translation available
HERE]UPD: HIATUS
Bookmarked by BadBadz
24 Dec 2025
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Sebastian Michaelis is an A-list model, adored by millions but fiercely private about his personal life. The world knows he’s married, but not much else. In an exclusive WIRED Autocomplete Interviews, Sebastian reveals a few truths, teasing the world with glimpses of their relationship.
Series
- Part 1 of The Devil Wears Prada
Bookmarked by BadBadz
27 Nov 2025
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But, oh, it was difficult. The longer the butler sang, the more Ciel squirmed, hand shifting as if with a mind of its own towards his groin. The first touch of his fingertips made him hiss, inhaling sharply. The head was wet, dribbling against his stomach.
It was abhorrent. If he weren’t already damned to be consumed by a demon, he would worry over his soul. Surely such an act-- touching himself to the sound of his butler’s voice, while said butler was in the room with him, unaware of the sin-- was unforgivable. If God was watching from above, surely He was disappointed in the boy.
Series
- Part 23 of Kinktober 2025
Bookmarked by BadBadz
27 Oct 2025
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Summary
After returning from their nightmare on the Atlantic, Sebastian and Ciel's relationship begins to change.
Bookmarked by BadBadz
26 Oct 2025