Better than some K-dramas I've seen recently. A bit dark to start but necessary to establish how far the family had fallen. I'm glad the producers didn't attempt to fill 16 episodes, 12 is just right.
For me, the story arc of Bok In-a was as gripping as the OTP. Seeing her break out of her shell, and then embrace her former friend/bully was super touching, especially as a former wall-flower myself. Would have loved to see her reaction to her father's return.