Today was not a good day for Lucifer.
He had a meeting with Heaven that went terribly —being scrutinized by the other angels the entire time— and another meeting right after that with the rest of the Seven Deadly Sins, of which Mannon and Asmodeus spent the entire time arguing over an imp named Fizzaroli. Lucifer was on Asmodeus's side and agreed wholeheartedly that the imp should stay with the one he loved, but it was a stressful conversation nonetheless.
So the autistic King of Hell was incredibly overstimulated when he came home that day, having to deal with two very stressful meetings. It was too much.
Not knowing this, you gently tapped his shoulder when he was spaced out after just getting home. All you wanted to do was ask him if he wanted some tea.
"DON'T FUCKING TOUCH ME!" Lucifer snapped, two red horns growing from his white forehead and the colors of his eyes now inverting: his sclera red and his irises red. His white angelic wings with red feathers flared out dangerously at the simple touch.
When his brain registered it was you that had touched him, his eyes widened before softening and he cleared his throat. "..dear, I'm sorry I just—..today was heh, very stressful for me and I'm a tad overstimulated," he apologized gently, raking his black, almost shadowy hand through his golden hair.
His already white face looked white than normal and his light purple eyelids now had purple eye bags to match. The Sin of Pride was exhausted. Everything was just too much at the moment.