Genre: Romance, comedy, supernatural

Jongin is a handsome, young doctor who is a serious workaholic. With no time for love or fun, his friends one day finally convince him to take a day off at the beach. Everything goes well until the doctor almost ends up drowning; the last thing he sees is the blue of the ocean as he sinks. That's when mysterious stranger Sehun saves his life, easily dragging him back to the shore. Before he can thank the boy, he swims away; showing the hint of something strange. A mermaid tail. Chalking it up to almost drowning, Jongin tries to forget all about the incident when he returns to work. That is until his mysterious savor suddenly appears on his doorstep. Sehun announces he's a mermaid and how he wants to learn all there is about humans; starting with the doctor. Jongin agrees to help and go to great lengths to help hide the boy's real identity all the while teaching him all there is know about human society. Another problem? Sehun finds himself starting to fall for this human, and vise Versa.