After waking from a hangover, Phurich wonders if he truly saw a merman the night before. He mentions it to Phana, who brushes it off, yet later questions Nava privately to uncover the truth. Meanwhile, Phurich pursues Nava, sparking a rivalry with Phraphai. But rumors spread across the island of several missing mermen—will this looming danger disrupt the course of their feelings?

Phurich unexpectedly barges into Nava's home and continues to pursue him boldly, though Nava thinks he's just a flirt. As they discuss the island's mermaid legends, Nava confesses that mermaids and humans cannot coexist, but Phurich believes that true love can overcome all boundaries. With Phurich's direct approach and Nava's secret identity, how will this forbidden relationship unfold?

Phurich wakes up hungover, and the atmosphere between him and Nava turns subtly intimate, though Nava remains distant. However, Phurich's obvious affection doesn't go unnoticed and his uncle sternly warns him that in the eyes of humans, mermen are nothing more than monsters or demons.