I wasn't really interested in watching this, the title made me think it'd be too cheesy. But the title in Korean would have been something like "Top Scandal" instead of Romance so anyway I decided to watch and I'm glad it wasn't just focused on the romance part. By reading the comments here I see that some people find it weird that the female lead was older and "looked like it". That's insulting in so many levels. And more importantly, it happens in real life that people look their age and sometimes they get in relationships with younger people. Both male and female. So that was refreshing to see.
The whole drama managed to include Sky Castle-ish education issues, a mystery case, murder, suic*de (I never saw a trigger warning, maybe I missed it), and others, in just 16 episodes, so that's quite a feat. And that's why it wasn't boring.
The actors were all great, both young and old, as expected in Korean series. If only they spoke juust a bit faster. Watching it in faster speed helped.
Sometimes I was annoyed by how rude they spoke to the brother with Asperger's but I see no one mentioned it so I guess I'm overreacting.
All in all pretty good, and very unexpectedly so!