The lovely cursed princess

Princess Meha recieves a strange letter from an anonymous person after locking her favorite maid in the quarters. Right after receiving the letter the princess locks herself in her chambers and refuses to see any one. Letting the little princess have her way, the door as later broken down only to later meet the princess in an unconscious state, with the priests stating that the princess has been cursed. What could be in the letter? Who is the anonymous man? And just who is this mysterious man who keeps helping the Kingdom of Joasia?