I really enjoyed the start of this drama, the chemistry between the three friends and their background and family stories. In my opinion this show had such a huge potential that has been completely wasted on the lovestory of the main couple. The plot itself focused on the wrong things and up to now I do not understand how this car accident had such a great impact (she didn't die so come on don't be so overdramatic!). Also I sometimes had a hard time to understand the feelings of the characters because it seemed like they wanted to make this story super dramatic but failed to explain why it was so dramatic and desperate since they ignored the background stories. The ending was so typical for such a drama but I was glad how it ended for soo ji and se joo. But yeah overall the plot was quite a mess.
The acting was great if you ask me, even though Joy could improve a bit ;) I actually watched this drama because I loved Moon Ga Young in True Beauty and she did not disappoint at all! She is amazing!
As mentioned I think they could have done more with this, but I still enjoyed this drama because I really cared about the friendship.