Let's start with the obvious! You're NEVER gonna watch this show, because it's well-written, because it's not! I could tear apart the story like a piece of paper.

The base of the story is a mess, there are no rules, basically. I know, every fantasy is different, but I think they made a mistake with some things like that water part. That's basically the biggest plot hole in the story. If one simple drop of water can change her back to mermaid, she couldn't leave the house, basically. They should've done it like in other mermaid shows, like she's only changing when it's seawater.

Also, the crime story was handled poorly. Not to mention the mother story. I get that she divorced and left the house, but for the love of God, how can she leave her son as well? We didn't get a proper explanation of why or how it happened. That's not a real mother in my eyes! The law doesn't work like that, not even in Korea, she could've seen her son at least on a weekly or monthly basis.

The whole story was predictable, BUT with shows like this one, it's not really about the story. It's about the characters, and basically every character were great.

Jun Ji Hyun and Lee Min Ho were amazing together. Especially Ji Hyun. I can't believe she was 34 when they shot this Kdrama, yet she looked like the cutest puppy ever. Her (face)acting is something else! She was not only cute, and obviously beautiful as hell, but badass as well. The love story between them was not ordinary or new, but still, I was invested 100%!

Honestly, at first I was like: "20 episodes, why?" But it didn't felt long or stretched, because most of the episodes are like fillers, in a good way. It was like a weekly American show.

My biggest problems with the show, other than the writing, is the last couple of episodes, AGAIN! After they finished all the main story, I just can't understand why they had to start a new drama with her leaving, not to mention erasing everyone's memory. That was 100% pointless, and ridiculous. At first, I was like, why is her heart has a problem, but later we find out the reason, and that made the whole FAKE DRAMA even worse! If she had to leave because she needed time to heal, she should've just said it, not making a fuss about it, so the writers can waste time for unnecessary scenes.

She should just leave, for 3 years, everyone knows what happened, and come back later. End of story. I mean, two of them already knew she's a mermaid, they could've told his mother and the other kid as well.

The last 2 episodes could've been like those filler ones, living in peace, raising their kid etc. Also, we never get any real explanation about that girl who can hear her thoughts. I mean, sure, she remembers her past, but that's not a real explanation. Just because in the past she was a mermaid, it doesn't mean she's a mermaid in the present as well. We never see her mother or her father as well. At first, I thought the father is the guy who died. That would be a nice side story.

Anyway, like I said, you won't watch this show, because it's the best ever, it's a show that you're gonna enjoy if you don't about the story too much, because it's a LOT of fun, and the drama is well-written, most of the time.