sinsoftheabyss (horrorsintheunknown)
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Recent works
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#9 Skirt Stays On by sinsoftheabyss (horrorsintheunknown)
Fandoms: Kuroshitsuji | Black Butler
25 Oct 2025
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Summary
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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Summary
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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#7 Recording/Image Taking by sinsoftheabyss (horrorsintheunknown)
Fandoms: Kuroshitsuji | Black Butler
19 Oct 2025
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Summary
> Brat <3 sent an image
Sebastian immediately opened the notification, his attention shifted entirely away from the presentation. His mouth nearly fell out of his jaw as he laid his eyes on the photo.
It was a front facing shot of Ciel kneeling on the bed in the tightest black latex he had ever seen. He was wearing a crop top that stretched across his chest in a way that left absolutely nothing to the imagination, stopping just under his sternum and leaving ample room to show off his waist. Below the shirt were low cropped shorts which cut across his hip bones, stopping about halfway down his thighs.
Series
- Part 7 of Sebaciel Kinktober 2025
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#5 Cockwarming by sinsoftheabyss (horrorsintheunknown)
Fandoms: Kuroshitsuji | Black Butler
13 Oct 2025
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Summary
“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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#4 Monsterfucking by sinsoftheabyss (horrorsintheunknown)
Fandoms: Kuroshitsuji | Black Butler
10 Oct 2025
Tags
Summary
“Sir, this cabin is so cold,” he whined pitifully. “Won't you come warm me up?”
Sebastian peered disdainfully at such a sinful display, letting his own demeanour drop from warm to frigid.
“So you could stab me clean through? I don't think so.”
Ciel’s invitingly large pupils shrunk into sharp slits, his head tilting imperceptibly as it let out a curious, “Oh?”
Series
- Part 4 of Sebaciel Kinktober 2025
Recent series
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Sebaciel Kinktober 2025 by lacy_alter, sinsoftheabyss (horrorsintheunknown)
Fandom: Kuroshitsuji | Black Butler
25 Oct 2025
- Words:
- 21,939
- Works:
- 9