When Lyra’s sister steals the mate fate promised her, Lyra refuses to break. Instead, she chooses Vayne—the terrifying S-rank sea dragon everyone fears. Powerful enough to rule the abyss yet gentle only with her, Vayne becomes the one place she finally feels safe. But as old betrayals, dangerous tides, and buried truths close in, Lyra discovers that losing the love she once wanted may have led her to something far more dangerous—and far more devoted.