The Mermaid King

35 episodi · Betrayal · Boys' Love (BL) · Cultivation & Xianxia · Dark & Toxic Romance · Enemies to Lovers · Fantasy · Power Fantasy · Rags to Riches & Sudden Wealth · Rebirth & Reincarnation · Regret & Redemption · Revenge & Comeback · Romance · Sci-Fi · Stand-In & Substitute Lover · Strong Return · Sweet & Fated Romance · Tearjerker & Bittersweet · Time Travel & Transmigration · Underdog & Comeback · Wuxia & Martial Arts

Trama

Mermaid heir Cassius seduces mutant prisoner Elvin, using him as a living filter for Loran’s poison. Betrayed and cast into the abyss, Elvin returns three years later as its ruthless lord—forcing Cassius to sacrifice his heart and soul for redemption.