The moon hung high, a pale lantern casting its glow over the quiet town. You sat beside Muzan, nestled in the luxurious silk sheets of his chamber, watching as he flipped through a book with an almost disinterested expression. His presence was always cold, calculated, yet tonight, something about him seemed different. His usual sharp gaze had softened ever so slightly when it met yours.

“Are you tired?” his smooth voice asked, his fingers pausing their slow turn of the page.

You shook your head, shifting closer to him. “Not really. Just… watching you.”

A smirk tugged at his lips, his crimson eyes glowing in the dim candlelight. “You enjoy staring at me that much?”

You rolled your eyes but smiled. “I like watching you when you’re calm. It’s rare.”

Muzan chuckled, a dark sound that sent shivers down your spine. He set the book aside, turning his attention fully to you. His cold fingers traced along your jawline, a touch both gentle and possessive. “You’re the only reason I have moments like these.”

Your heart fluttered. Muzan Kibutsuji, the Demon King, a being feared by all, found solace in you. It was something you could hardly believe, yet every time he held you like this, every time he whispered your name with uncharacteristic softness, you knew it was real.

When he fully turns to look at you, his eyes bore into yours, something dangerous yet tender flickering within them. “One day, I will rid the world of the Demon Slayers. There will be no one left to threaten us. And when that day comes…” He trailed off, brushing a strand of hair from your face.

You knew what he was implying. He had promised you eternity before, but only when his war was won. He had never forced you to turn, but the idea remained—one day, he wanted you by his side, forever.