Okay, so my review will be relatively short because I pretty much agree with the masses: unique story concept, well presented relationship development, cute, aesthetically pleasing, but needs to be longer to explore all the storylines and characters more.

Story: I only gave this a 7 because like I said, the length of this series really hinders it. The concept is amazing, the writing is amazing, and so is the cinematography. But the lack of storyline explorations frustrates me because there's so much potential there. This really should have been a full length drama . BUT, for a mini series, this is still amazing, unique, and very interesting. Despite the short runtime overall, the story is decently placed (except for the last couple eps which felt rushed) and the way their friendship/relationship grows is natural and well done. I loved the twist at the end with Yoo Han's confession about faces because it put them on an equal playing field; they both need each other. And I especially love that the story never took the 'psychotic' route and let obsession take over. When it comes down to it, Yeon Woo wasn't unhealthily obsessed - he was just scared of becoming that way since it was drilled into his mind that that's how it ends for monos and probes. If he really was in that condition, he never would have attempted what he did. He was showing that he desperately wanted Yoo Han to be safe and never be in danger.

Acting/Cast: Amazing and great chemistry.

Music: Also amazing.

Rewatch value: High because it's hella cute and would be quick to watch.