Comedic genius. First half is delightful comedy, second half is more drama. Male lead killed it. How female lead character portrayed made you question one more time 'is this a gimmick?' Do Korean female adults go to college and still leave with naivety of children to the extent that you wonder if higher education doesn't result in fundamental maturing or is this embedded flaw in how women are depicted? It is one thing to have a specific aim in sketching a character but one that is detrimental to the final goal is insanity.
Nevertheless others pushed past that. Both the male lead and the actor who was the boss's in-law left no stone unturned. They mashed it up! The elders are always on point. Excellence is always demonstrated in their acting. The one other disappointment was the actor who played the trainee of male lead. He was pigeonholed and fell flat. He is normally dynamic and outstanding as a supporting actor but this was below his norm by far. Director's error. Can't box him in.
This, along with female lead character, is what led to poor ratings. But others who have on average 8 or 9 stars can't touch this. Just can't. But excellent and popular, while seemingly synonyms in TV world aren't even cousins in real life. One of my friends from school once got 11/10in an assignment for which partner got 8. My point? The hits outweigh the misses.