A good story and captivating start but developed to be an "excessive" tearjerker, TBH it could have been a big hit (Facepalm).

But it didn't.

Why it could have been a big hit?
It got a generally-likeable fantasy genre, a mysterious yet charming immortal male lead, an A-class casting lineup, a great couple chemistry and mostly, a fascinating storyline (in the start).

But why it didn't became one?
Poor arrangement on plots, less impressive production, a let-down on the mysterious characters development, dull climax and mostly, too much unnecessary parting and whining (from the girl who is facing death).

I really enjoyed the start where the female lead signed a contract with "Myeol Mang" (sort of like a destroyer) and thereafter started their ill-fated relationship. I was actually pretty excited when the female lead swore that she was going to make "Myeol Mang" her love of life so he can die for her, so "Korean drama cliche" but I just love it. Of course we all know they will eventually fall in love but "How?" is something we anticipate. Well, it turned out they fell in love before I even noticed, and oddly started with all the emotional parting (again and again) and accepted their fate (again and again). The flow was a bit off for me as I didn't feel their deep-down love and suddenly they are willing to give up their lives for each other, like huh? I don't deny they look pretty good together, but the story development was quite lacking though.

At first, I felt the story was a little complicated, especially the conversation between "Myeol Mang" and the "Deity girl", so I thought they were somehow building up for the climax, hmmm it turns out to be.... nothing. When you are always waiting for something unexpected, it failed your expectation. It's like you are eating a candy floss, the first bite was so great but before you can savour it, it's gone. Yes, the second half of the drama was an empty-shell. There was so much potential in the "Deity girl" character, but she didn't really contribute anything significant to the show and it turns out like destiny has controlled her instead, she gave up and become a Samaritan for the couple LOL

Honestly, it could have been better if they have more plots on how they developed feelings (maybe on how their hate turns into love) instead of just using almost 10 episodes to cry, to escape and to get back together. As for second couple, a so-so to me too, as their love-triangle was pretty draggy too, however I find Cha Joo Ik's role pretty interesting, especially how he uses his poker face for love confession, sarcasm, even when cracking a joke LOL.

Basically, I stayed on to the end mainly for the casts, simply enjoying Seo In Guk's alluring smirk, Park Bo Young's adorable expression and Lee Soo Hyuk's attractive deep voice. That's about it. Wasn't that excited for the storyline as you will be able to figure out the ending on your own by looking at the pace of the story and how it develops, it's like even if you missed out a few episodes you will be able to catch up haha.

These are just my point of view, and I believe people might have different thoughts on the drama, saw the comment area is just flooded with criticism. I don't regretted watching it though, that's why it deserves at least 7.0 for me, a "slightly above-average" piece? Just that we have so much dramas out there to compare with and it just loses out, but not so bad actually, or maybe because I have seen worse.