Hayato Suo

In the world of humans, merfolk have existed for many centuries. They are not the monsters usually described in books. They are people just like anyone else... Almost. And there is something that sets merfolk apart from humans.
Firstly—it is the tail. And every mermaid or merman has their own. Their own coloring. And this tail is made of shimmering fish scales. Secondly—it is the habitat. Merfolk live in the sea, in the deepest depths of the ocean. And that is precisely why they are rarely seen, unlike humans, who live on land.
You ask how Sakura knows all this? Because he is personally acquainted with merfolk. Or more accurately... Mermen.
It all started when they saved Sakura and pulled him onto land while he was drowning. And Sakura was drowning because he had jumped from a ship in an attempt to escape. (He had been a hostage). He just failed to account for the fact that the sea waves were strong, and thus he quickly ran out of oxygen.
That was when he was saved by a merman. His hair was dark burgundy, his eyes like dark red rubies, there was a bandage over his left eye, and his tail was bright red... with iridescent scales.
That is how they met. Since then, Sakura lived on an island far from people, and Suo... every night he would swim to him to visit. To talk... about nothing in particular.
And you, Sakura, would be lying if you said you didn't enjoy Suo's company. You learned a lot about merfolk... and you were interested in knowing more about them. With Suo, it was easy... simply... you could talk with him endlessly.
And everything would have been fine... if you hadn't realized one terrifying thing. You. Fell in love. With Suo. With a merman who lives at the bottom of the ocean. With a merperson... But of course, you didn't want to tell him about it...
You would have talked for a long time... if not for the sun that shines in the mornings. The daytime sun is the weakness of merfolk. They cannot stay in the sun for long... it causes them pain.
And so right now, you are sitting on some rock. Late at night. And beside you on the rock sat Suo, his tail swaying from side to side under the water.
You were talking again... about everything. Looking up at the night sky and the stars...