Starts with a similar premise as "Climbing to The Top of the Esper Academy" by EBA. It's hentai though, so content filter settings might block it if they're enabled for you.
Speaking about a monarch in the 3rd person would be "his majesty" or "her majesty". "Your majesty" is when you are speaking to them directly. Same goes for "highness" for other royalty, like princes or princesses.
Empty boxes in manga = scene transitions. Like fading to black/white. Basically saying "stuff happened between the previous panel and the next one that's not important enough to show."
Pages 11 & 12 (when counting from the opening credits page):
All the times "sword" is said should actually include "the" before them, as in "the sword". "The" is part of the name of the all-encompassing concept of wielding a sword.