Back Off! She's the Sea Queen's Daughter

Atlantis was a kingdom under the sea. The color-scaled nobles ruled. The gray-scaled commoners suffered. Queen Diana lost her four-year-old son Leon in a rebellion twenty years ago. To protect her daughter, she sealed Alice's seven-colored royal tail and raised her as a gray-scaled commoner. On her eighteenth birthday, Alice was working in the lord's mansion. The lord's daughter Bella stripped her scales in public. Her boyfriend Danny handed the knife to please the powerful. Queen Diana broke down the door and saved her. The adult tide rose. Alice revealed her seven-colored royal tail. General Arthur protected her. He fell in love with her. But a birthmark and a token made everyone believe he was the lost prince. The lovers were forced to call each other brother and sister. The truth came out. Arthur was not the prince. The real killer of Leon, and the person who had been harvesting gray scales to fund the rebels for twenty years, was Lady Martha. The abyss army reached the gates. The queen was poisoned. Alice united the gray-scaled commoners, defended the city, awakened her full royal tail at the coronation, defeated Martha, and pushed open the palace doors that had been sealed for a hundred years.