Pros: What makes this drama really entertainment (in my opinion) is the second couple. I find them way more interesting than the lead story (they are kinda boring and don't have a lot of intimate scenes) and I feel like at some point they have more screen time so you kinda want to see them more than the main couple.
The friendship between the girls is so pure and beautiful, the brother is the best character in this drama, the female lead is cute and the main lead is a great person.
Cons: I feel like if I watched this drama in my teen years I would love it and be one of my favourites, but now I'm almost 24 years and drama like this are really predicable and becomes very boring... this has 35 episodes and honestly I think is too much because the episodes are really similar, the story doesn't really move till episode 21...
Overall watch it if you want to watch something entertainment