The heir to a powerful human kingdom never expected their diplomatic voyage to change the course of their life. When their ship enters the waters of the Crimson Reef, it catches the attention of Keigo Takami—better known as Hawks, an infamous lionfish siren and Captain of the Reef Guard. Bored and looking for entertainment, he decides to toy with the royal passenger. What begins as harmless amusement soon becomes something far more dangerous. As tensions rise between the kingdoms of land and sea, both find themselves caught between duty, loyalty, and feelings neither can afford to have. Because falling for the enemy is one thing. Starting a war over them is another. A fantasy enemies-to-lovers romance featuring sirens, royalty, political intrigue, and a dangerously charming warrior who doesn’t know when to leave well enough alone.