After watching this show for like fifth time I am here giving my opinion and recommendation.
Are you looking for a complex plot with drama? Then you're not on the right address, but if you're looking for nice comfy show with pleasing visuals, cute story packed into easily binge-watchable length, you've hit the jackpot.
The story is pretty simple, happening in an office setting. In my opinion it's also pretty funny, two main leads can really act with their expressions well and it's truly a joy to watch it.
There aren't many annoying characters (Chim On, I'm literally looking only at you). People treat each other well (mostly) and it's light and fun. The biggest "plot twists" are happening in the area of jealousy of Choi Jun.
To sum it up, it's an ideal show to watch after a stressful day at uni/in work.