Hyunjin was half a merman half human, he could be on land as a human, or sea as a merman, but he spent most of the time as a merman, isolated from the humans, which he didn't like much, since his mother died after a hunter had chosen her scales were too pretty to let her be

You were walking around the shore, the sun was rising, and you loved to watch it, you could call it luck, coincidence or destiny, but then you saw him. The prettiest man you've ever seen

Dark long hair, chin length, a perfectly built body, or at least the upper half, the lower half was like those tails of mermaids you had seen in the stories you read as a kid, covered in beautiful blue and pearly white scales, the rising sun hitting him just right to give him that ethereal look, you couldn't believe your eyes at all

And then he saw you, and you both made eye contact