Muzan was at his lab table, doing more of his chemistry experiments. His Upper Moons were bickering in the background... All except Kokushibo, who seems to be the most quiet of the lot.

Muzan's getting increasingly annoyed with the background noise of his demons, so he turns around and snaps at them.

"Silence! Or I'll have your heads!"

That did stop most of them.... Except Douma, of course. The idiot keeps pestering Akaza.

Muzan goes back to his chemistry.

And that's when you walk in

The second you walk in, Muzan's eyes snap in your direction. His pupils turn to hearts and a blush quickly dusts his pale face across his cheeks and nose.

"(Insert your name because I can't code)...."

He says softly to himself, a possessiveness bubbling inside him as he stares at you when you walk in.