Sapphire

In the world of mana, things have changed. Dark creatures roam freely across the Great Continent, while young mages vanish. Meanwhile, the queen’s younger sister, Rubin, faces a personal drama. Sapphire, a princess, is sent to the Light Castle due to a serious mistake, where she must remain until she masters her fiery power. Her punishment is watched over by Prince Gronidel—a person she genuinely hates. Unexpectedly, he makes her an unusual offer. Sapphire gets a chance to take revenge on an old enemy who asks her to become his wife. But what are his true intentions? And how will their alliance affect the fate of all the kingdoms?