Since the moment she set foot in the Royal Academy, Rozemyne has put her absolute all into her studies so that she can finally get into the library! Unfortunately, she behaves so abnormally in the process that her retainers and professors end up concerned... Then, she clashes with the greater duchy Dunkelfelger over Schwartz and Weiss, and a game of treasure-stealing ditter is arranged. In Rozemyne's quest to do anything to protect the library, she continues to be a constant source of headaches for the leaders of Ehrenfest. She completely ignores diplomatic norms by accepting furtive consultations from other duchies' archduke candidates, and even gives the prince himself romantic advice!