First off, Oh In-Hye is insufferable. I hated each second I had to watch her.
Second, while Oh In-Ju wasn't nearly as bad, in the last few episodes her character became, honestly, very dumb.
While I can understand why the characters acted the way they did, I don't agree that it was well executed.
And the OST kinda sucked.
Otherwise, Oh In-Kyung was a delight and her partner in crime had really nice chemistry with her so their segments were very fun.
I had a bit more hope about the last twists but they were still nice and I liked most character endings (except In-Hye but it might be personal lol).