Random Anime Oneshots

Sebastion Michaelis x Iseaki!Reader

The world twisted.

You hadn't seen the truck. One minute, you were crossing the street, earbuds in, mind on something stupid—what to eat for dinner, probably. The next, you were staring into a vast, starless sky, your body floating in a cold that didn't bite. A voice you hadn't heard in years echoed in that void.

"Y/N?"

When you turned, you saw him—your brother, grinning with a glint of sharp canines and eyes that pulsed an unnatural red.

⸻

You woke up in a mansion.

Not yours. Not anyone's you'd ever known. But you weren't dreaming. The stone walls, the flickering candles, the antique furniture—they were real. And so was the black-suited figure who greeted you with a deep, formal bow.

"Welcome, my lady. I am your butler."

"...Malihkai?"

Gone was your gamer-brother hoodie and sarcasm. In his place stood something colder, taller, with a shadow that flickered unnaturally. But it was him. And like you, he'd died—or been taken.

But where you arrived human, Malihkai had come as a demon.

⸻

Weeks passed.

You learned the rules. Or rather, you learned there were rules. This England wasn't quite the one from your textbooks, though somehow this place seems familiar to you. Malihkai called it a "thin space"—a place where humans, demons, and other things moved freely. And you, for some reason, were now a lady—with a reputation you didn't earn and power you didn't understand.

Malihkai played his part well. Too well. Always behind you. Always calling you "my lady." But sometimes, when the other nobles left and the doors were shut, he dropped the act.

"You're not safe here, Y/N. This world has rules we didn't write. And others are watching you."

Others?

⸻

That's when you met him.

It was a party in London—a gathering of the Queen's chosen nobles. You had no interest in politics, but Malihkai insisted you go. He always knew more than he said.

And that's when you saw them.

A young boy with an eye patch.

And the butler standing behind him—tall, impossibly composed, with the same hellfire in his eyes that your brother bore.

"Earl Ciel Phantomhive," Malihkai murmured, voice taut. "And his butler. Sebastian Michaelis."

The moment your eyes met Sebastian's, you knew.

He knew. What you were. What Malihkai was. Maybe even how you got here.

⸻

Later that night, he found you.

Not by accident. Not by coincidence. One moment you were in the garden, catching your breath, and the next—he was there. Like he'd always been.

"Strange," he said, circling you slowly. "You carry no contract seal, and yet... you walk with a demon's shadow. How curious."

You swallowed. "Is that a problem?"

Sebastian smiled, head tilted like a cat sizing up a bird.

"Not at all. In fact... I find it fascinating."