@Seiji Himouto It's probably not a yuri, given both the title and how these sorts of stories usually work.
At a guess, Prince Dietrich is the young boy from the flashback. I wouldn't at all be surprised if Diane is somehow related to the royal family given her looks.
At a guess, Prince Dietrich is the young boy from the flashback. I wouldn't at all be surprised if Diane is somehow related to the royal family given her looks.