I appreciate you asking me to translate, but "Anagram" is already in English. The text you provided doesn't appear to be Japanese text. If you meant to provide Japanese text that needs translation, please share it and I'll be happy to translate it for you.

Heather is a marquis's daughter who has never married, famous for being an "eccentric." She thought marriage was out of the question for her, but through a plot by her grandfather and brother, she found herself engaged to the Margrave Kyle without knowing it. She finds herself drawn to the straightforward margrave who is easygoing yet somewhat pushy, but he harbors a complex secret about his origins... "Margrave Murdoch and the Marquis's daughter Diofrancis. These two must never be joined together. If things go wrong, it could shake the very foundation of the royal family." "Alexandrite was given to my son." What is the meaning behind these mysterious words? A secret of origin. Royal blood. An unreadable letter hidden among Kyle's father's belongings. Where do all these seemingly disconnected events lead? While weaving together mysteries and incidents, this is (probably) mainly a story of a composed margrave becoming utterly devoted to a slightly tsundere young lady.