Now here's a refreshing take on the vampire romance genre. I disagree with comments saying that this drags on. It is lengthy, but it never really gets boring. I feel that it actually needs the slow pace for the character development and room for the female lead, Ma Ri, to come to terms with her feelings. She's got a lot to sort out after all. And by Chapter 57, it's all the more satisfying and special when she does. I'd liken it to a butterfly emerging out of cocoon. With a story like this, I would be extremely pissed if she declared her love to Jae Min and they kissed and walked off into the sunset. And then I'd soon forget about it after that, because then it would be like every other romance story.
In short, if you were to summarize what goes on between chapters 1 to 57 in a clinical way, then no - there is "no progress". However, with every panel there IS progression in feeling, just as there would be in (a slightly more heightened version of) a real life romance... if you were a teenage vampire girl, that is.
I must point out that there is a great sensitivity with color and mood. This is the best part of it. Every panel is rich, and there were a few moments that took my breath away. The way the artist paces the story makes you feel as if you're living in this world rather than looking in on it. Oh, the guy is extremely cute too, so maybe I'm a bit biased. 😉
I would say that the only negative thing about this manga is that it's a bit depressing, and maybe a bit too subtle in parts. All in all, I can tell that the mangaka put a lot of time into this, and I loved every moment of it. Most of the characters may feel cliche, but they also feel special in a way, and none of them are one dimensional. I read it all in one night without sleeping (and during finals week), and I don't regret it at all. Still constantly refreshing the page to check if there's a new chapter yet. Don't skip this one!