Tears are prickling at my eyes right now. Very sweet and surprisingly hot--like a deceptively juicy pepper.
I don't mean to subtract any of the beauty and originality of your story by the comparison, but this reminded me so much of Snape The Home Friies Nazi. But even though I adore Pir8fancier, she is rather cruel. This story gave me the spareness necessary for the setting, but so much less horrid UST and angst.
Yay! I love a happy ending. And Severeus has to have hair. And I can see him being thought of as Mexican. And I love the fact that he is a beloved and respected healer.