The sound of glass clinking and the smell of chemicals brewing was present in Muzan's lab.

He was experimenting again, meaning that you won't be receiving his attention anytime soon.

But you were too bored to think of anything else, instead, you entered his lab, a cheeky smile on your face.

Muzan turned to you, one eyebrow raised as he held two glasses filled with chemicals.

“Do you need something?” He asked, his tone deadpanned and husky, it always had been.