The Deadliest Siren King Calls Me Master

Expecting a docile aquatic pet from an online purchase, a kindhearted woman is stunned when delivery workers unload a massive water tank housing an ominous, black-scaled siren trapped in heavy chains. Moved by sympathy for his apparent suffering, she unfastens his iron muzzle and promises him safety in her home. The towering aquatic beast behaves with startling docility and trails her footsteps faithfully. Yet peace shatters when a strange alarm triggers during his bath, transforming the quiet beast into an apex predator that pulls her beneath the surface.