From Mudblood to Atlantis' Owner - Episode 3

Rosalie, a woman born with inferior 'mudblood' genes, is being urged by her mother to marry Prince Xavier, a godblood mermaid. Xavier unexpectedly rejects this arranged marriage before the king, declaring his love for Rosalie's half-sister Vivian instead. Rosalie sees the hatred in his eyes and realizes Xavier has been reborn, just like her, and is pursuing Vivian to sire a pure godblood child. Knowing Vivian's past-life child was a fraud, Rosalie ends the episode by coolly agreeing to their union, setting the stage for her revenge.