Saved by the Siren from Hell

Marina, daughter of the Coral Court's patriarch, shatters the holy coral crown at her awakening ceremony and everyone brands her cursed. Her fiancé and adopted sister betray her on the spot, and her father sentences her to the inescapable Abyssal Purgatory. There she meets Caspian, the last survivor of a fallen royal line, imprisoned for years by his uncle as a living test subject for forbidden magic. Two outcasts bond in the dark. Her Medusa blood breaks his curse, and his warmth shields her from the freezing currents. Caspian later leaves the purgatory to save his kin, while Marina gives birth to twins alone in that deadly place, awakens her true power, escapes with her younger daughter Luna, and rises as the feared Queen of the Sirens. He takes their older daughter Maya. Five years later, Marina returns for vengeance and reunites with Caspian, now the Abyss Lord. She carries nothing but hatred, yet he fails to recognize her. The truth behind the shattered crown unravels layer by layer, and every scheme the conspirators set in motion comes to light. Once the misunderstandings clear, they join forces and destroy their enemies. Marina claims her throne as the Coral Court's rightful matriarch, settles every old score, marries Caspian in a grand ceremony, and walks into the ocean's morning light with their family of four.