In the year of 921, in a world called Ivoire, lives Marona, a 13 year old orphaned girl with a special ability to communicate with phantoms. Marona believes in her parents’ teachings that people will one day come to like her as long as she stays compassionate and kind.
Now Marona travels throughout Ivoire with her guardian, “Ash the Phantom”, to resolve disputes around the world.

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On a small, lonely island in Ivoire lives Ash, a Phantom who lost his life in battle, and Marona, who has the ability to communicate with Phantoms. Sometimes, Marona receives Bottlemails that float along the sea.
Marona, who lost her parents when she was very young, makes her living by completing the requests inside the Bottlemails as a Chroma, a person who accepts freelance work to solve problems for people. However, because of her abilities, the people call her the “Possessed.” Even if she completes her work, some clients will hesitate to pay her the reward because of her reputation.
Still, Marona stays optimistic and follows what her parents told her long ago: “Help people, and someday everyone will start to like you.” Her goal is to save enough money to buy Phantom Isle, which she’s currently renting. Like a subtle wave in the sea, the adventures of Marona and Ash are about to begin.