New Fantasy AU??? (Patreon)

AU where Deku is a prince whose kingdom got conquered and all of his people were slaughtered and the King who led the siege ends up being his mate 🥰🥰🥰 I just imagine Deku literally trying to poison him and there always has to be a taste tester, he has to be chained to the bed when Katsuki wants to consummate their mate bond, and Katsuki has multiple scars where Deku has almost landed fatal blows 🥰🥰