Reasons to watch: LEE MIH HO xD
This is one of the best dramas I've seen.
First of all: THE PLOT!! Lee mih ho is an incredible actor (he's my favourite) I wached every drama of him :D I loved Jeon Ji Hyeon since "My love form another star", she's so pretty and did an amazing job. I like Shin Won Ho too, he was cute here, the rest of the cast did a really good acting too.
Second: THE STORY! The story is just perfect, the base is simple: a mermaid goes to earth, she's dumb, doesn't know anything about Korea but she finds a guy that is handsome, rich...and fall in love on him.
Third: The scenario was beautiful *__*
Fourth: MERMAID! We don't have many k-dramas with mermaids (I konw...pity) I love them :)
Fifht: The OST are something we all love and made the drama "real", pure or heart touching.
Sixth: I loved the romance with the comedy, it was so well made, really cute.
Seventh: LEE MIN HO sorry =.=