Though not perfect by far , this drama deserves a 10 for:
1) actors' genius acting, 2) convincing - realistic to the very detail - settings, also a FAB sense of fashion, with that 80's vibe, 3) original idea. You could swear this one just aired, it's got an incredibly modern look!
It starts as a comedy, and totally fun! But then it turns into melodrama, which is less convincing... Still the old trope of Cinderella - Cold Prince gets a fresh approach, which is quite catchy. The ML is - for once - a sensitive caring human being, not a heartless CEO, and the FL is very natural with her boyish look!
I disapprove of taking lies too far though...
The second couple is annoying/boring and gets too much screen time. The three Princes from the Cafe are another story - very loveable.
Towards the end it seriously drags, with the 2-yr separation of lovers and all.
I would rewatch the first half anytime.