What kind of emperor just casually walks in the streets and walks up to one of their subjects house? He isn't some prince going incognito, but a full emperor. Wheres his horse/carriage etc. where are his bodyguards and attendants? Where is his dignity? He should have had the royal guards surround the home and demand they come for an immediate audience, not walk over and pound on their door like some commoner door-to-door salesman. It's no wonder he is getting slapped in the face with Lèse-majesté.