I admit I'm extremely biased for giving such an average drama such a perfect score, but if I don't then who will? It's not complex and it's definitely not too well thought out. It doesn't do anything new and it doesn't try too hard as a drama either. Which is exactly why you should watch it.
Had a bad day? Your own real life romance not going how imagined it would? Work/ school is hard? Then you shouldn't watch another drama about a pair of star crossed lovers who aren't allowed to be together ( although I do like those a lot) and you for sure don't need to watch that drama where two people keep on misunderstading and hurting each other. You don't need to. Not just yet. Just watch these 12 episodes and you'll feel better. Maybe I just got lucky and watched this very normal drama at a very correct time and place and setting of my life ( A time where I needed such lightness) but I hope that happens to you aswell...