El Heredero del Tritón

Vivian, an ordinary human, ended up pregnant with the merman king William's child after a failed IVF, but an abortion would kill her. Betrayed by her fiancé and sold off by her family, she had no choice but to sign a contract marriage with William. In the deep-sea palace, she faced hostility from the royal court. Using her self-developed merman medicine, she proved her worth, then saved the kidnapped little princess to clear her name. Slowly, she won the royal family's trust, and her cold contract with William began to warm, until noble mermaids who adored him set their sights on her...