I've started reading the webtoon at episode 12 so I didn't finish it yet so I can't compare it thoroughly. I know there are some major differences but I liked the drama a lot. especially the acting, all actors gave it all, Sumin (SongHa Yoon) was an incredible villain and I'm happy the actress got this recognition same as the main male lead JiHyuk (NaIn Woo) who was mistreated at first by k netizens for not being handsome enough, I'm glad they finally open their eyes and see how much potential he has and how much he personified the character so well. They all did such a great job, I was a bit disappointed at certain scene (eg : end of episode 14) about the acting performance but it was only a few ones. the overall drama is quite good i liked the performances, the making as well how the scenes were proposed. when we had flashback the layout changed to 16:9, and the colours faded w kind of sepia. I also liked how the main character evolved at some point i was like "wtf don't become the villain" but at some other scenes when she could see herself in the mirror it was my most emotional and favorite scene. supporting characters are very lovable too. I think I'll watch it again later ♡