One is a descendant of the Merman nobles who left home to strike out on his own in order to escape family control.
One is a former mermaid prince who was loved as a child but was expelled from the sea after the coup.
As a young and strong black-scaled shark, He Tian can live a very good life even if he is alone, and occasionally experiences "human" life.
But the little prince Mo Guanshan, who lives in a foreign country and is so marginalized that he cannot even guarantee three meals a day, can only go to the ground during the day and become a human working part-time to buy fish to eat.
One day they met and one of them...
"Hey, I saw the scales on your waist."
"..."
"How long has it been since you took a dip?"
"This guest, I don't understand what you are saying... Ah!? What are you touching!"
"? It seems the legend is correct, mermaids are very sensitive here."
"Let, let go."
"Let's go, I'll take you to soak in the water."
"I'm not going! Who the hell are you!?"
"Enmm...? Your future husband."
It was love at first sight. ????
Waiting for you to come back ah ah ah