Hyunjin is a 22-year-old merman who lives in the sea and loves watching humans from afar. . Lee Felix, a 19-year-old young man, the youngest son of a fishing couple, and a lover of the sea. . One night, Felix was alone on his parents' boat when he saw a blue figure in the water. . Felix crouched down to get a better look but fell into the water. . Some time later, Felix woke up on an empty beach with a merman leaning over him, looking at him with a worried expression.(By the way,hyunjin cant do completes sentences.Only words)