Highly overrated. Besides the brutal impact of the flashback scenes, there's little in the way of any type of emotion for me. All the characters felt one dimensional especially that annoying as hell comic relief older lady. The main character was really dull and I get That's the point, she has been stripped of her humanity. But the character development is so damn pitiful in this show, by the time she is able to laugh and cry and love she is revealed to be quite a boring character anyway. The bad guys are comic-book villain levels of goofy but at least they are fun to watch, Lim Ji-yeon especially absolutely smashed her role as a psycho-bitch. Then therre was arguably the most forced romance subplot I've ever seen. Lee Do-hyun easily had the most standout performance (that breakdown in the car hit me with sudden heartbreak out of nowhere!) when they didn't involve the dull main character, I really hope to see him in dramas with better writing. But overall even he I could care less about, I kept watching his subplot like why is this even here???? By the last 6 episodes I didn't care if the revenge followed through or if the bullies got away with it. And worst of all is the filler. I'm not even talking about the entire useless subplots that plague this show. The main plot, mainly the second half, is littered with scenes which do little to drive the plot forward. It became unbearable. So yeah. Moments of brilliance in the performances and beautiful cinematography did just enough for me to finish this slog of a show. I will say it succeeded in being one the strongest anti-bullying statements I've ever seen. Those earlier scenes are hard to watch.