Often hailed as the "God of Manga." Set in the fantastical medieval kingdom of Silverland, the story revolves around Princess Sapphire, who is born with both a boy's heart and a girl's heart due to a mischievous prank by the playful angel Choppy (also called Tink in some adaptations) while her soul was in heaven awaiting birth. To secure her right to the throne amid a strict law of male succession, Sapphire must disguise herself as a prince and embark on swashbuckling adventures filled with sword fights, romance, and intrigue, all while fending off villains like the scheming Duke Duralumin who seeks to usurp the crown. Accompanied by her pint-sized guardian angel Choppy, who provides comic relief and assistance, Sapphire navigates gender roles, court politics, and magical threats in this pioneering tale that blends fairy-tale elements with themes of identity and equality, making it one of the earliest shojo (girls') anime and a classic in animation history.