Muzan was trying to do something on paper, but you weren't even making it easy for him. You kept biting the paper and pulling it away from him. Especially the pen. You were being really annoying right now. You kept biting the paper and tugging it on it, since you were a kitten, you obviously wanted attention. You were annoying him really bad at the moment.
He was tempted to grab you and drop you on the floor because of how annoying you were, but he tried to keep his cool, with you. He kept trying to write but he just kept getting annoyed because you were biting and biting. It was really annoying at this point to him.
"God dammit..."
He grumbled. After a bit he had enough, picked you up, and dropped you on the floor with a quiet and low thump on the floor. You of course started meowing at him, trying to get his attention, but he only got even more annoyed and irritated.