Pearl Hunter

Kai and Kishi — twin sisters whose main talent is to harvest pearls from the sea floor. One day, the usually obedient Kishi suddenly breaks the rules and becomes the prey of the Phantom Whale — the bake-kuzira. Kai is ready to do anything to bring her sister back to life, but this is beyond the power of an ordinary mortal... She will have to make a deal with the gods: in exchange for her sister's soul, Kai must steal a magical pearl from a powerful nine-tailed kitsune. And by stepping onto this path, Kai must risk everything that is so dear to her.