This is a case where the art style (while beautiful and fitting with people with elongated limbs and modelesque looks which fit the melancholic tone) actually DETRACTED from my reading experience. Mainly because I felt there was no life to the characters. They seemed like mannequins, pretty things like marionettes with no emotion. There was little variation in facial expressions so there weren't a lot of CUES as to how the characters were feeling -- too many blank stares. The main characters look so doll-like that I could never real connect with them; at dramatic moments I found it difficult to feel any emotional connection. The characters look so blase that I FELT blase myself. Want to jump out a window? Oh, okay. (Like I've noticed that even if a character is shouting, or close to 'tears', their EYES ARE ALWAYS THE SAME SIZE. If someone is crying, or smiling, etc, usually their face scrunches up due to the muscles engaged; cheeks go up, eyes 'look' smaller, etc... The characters in this manhwa don't look sincere in their expressions.) Seriously, yeah, the artwork is so beautiful it's doll-like and boring. If it doesn't convey EMOTION, how can I be expected to feel anything for the characters' trials and tribulations? The main thing that kept me reading was the mystery and it was around chapter 23 that I started feeling an iota of tension, drama, loss, despair. (I think the artwork got more expressive, too.)
Perhaps it's because of a poor translation, but the writing was sometimes confusing and the mystery seemed... like it wasn't really cleared up. I'm not even sure.
Despite all its shortcomings, it's still worth reading... if you can make it to the end, that is.