What's Wrong With Secretary Kim is a light, fluffy romantic comedy except for when it's not. It's a bit odd but somehow manages to make it work.
The positives of the show is the main leads, whose chemistry with each other is off the charts and manage to stay cute throughout the run. It becomes obvious that the leads balance each other and the relationship develops fairly smoothly and entertainingly. Even the added darker story, meant to help balance the fluff, helps continue some of the cute and develop the relationship.
The downside is that the show is almost too light, often feeling like it lacks conflict or subsistence. There are aspects that get dropped (such as the motive behind the darker plot), and it tends to feel as if the plot is spinning its wheels. The main leads, along with some funny supporting cast, helps keep the entertainment coming but having some more and longer gravitas would definitely have helped elevate a great show.
Perfect for those days where you want something super light and fun. And a definite recommend if you're a fan of romantic comedies.