Can you catch mermaids with a fishing rod?

Sae-ah’s sole pastime—amid her demanding role as an overworked employee at an entertainment agency and a busy social life—is fishing. "I wish I could be stranded on a deserted island and spend the rest of my days fishing in tranquility!" she muses, grabbing her fishing rod once more… and unexpectedly, her wish is granted! Initially, she is alarmed, but she quickly reassures herself, believing that those she was with will report her as missing. With this relaxed attitude, she begins to fish even on the deserted island... She feels a strong pull—certainly, it’s a substantial catch!—and her excitement grows. But what she hauls in isn’t a fish... it’s a person?! A merman?! Suddenly, she finds herself in an awkward situation of cohabiting with a merman on the deserted island... and intriguingly, this merman appears to be concealing a profound story. What could it be?