To start off the story has major potential.
I loved the Sang siblings relationship. Their relationship is what kept me hooked.

I personally think the ML's acting wasn't that great. I couldn't really feel the emotions that he was trying to portray. I felt they had a good opportunity to make his character have depth but they didn't.

The entire story revolves around her being madly in love with the ML, which is understandable considering the title. But I felt there should have been more scenes that show his love.
It's almost like the writers and directors had enough of female chasing male, so out of nowhere the ML falls in love. How did that happen? When did that happen? Why did it happen? None of these questions are answered.

I personally love Rosy Zhao but this was the most annoying character she ever played. She was trying to hard to be childish and it came off as weird and strange to me. It made her more unrelatable. Though the situation the FL is in, I think a lot of us has gone through similar emotions (I personally have been in similar situation). But most of the time the FL was so pathetic about it that I didnt feel sympathy but anger.

Once the ML falls in love with her, he barely chases her and starts teasing her because he figured out he was her crush. He also kept standing her up. Yes, he had legit reasons but he never once explained it to her. The main couple never talk, they never have the real convos.

The most unrealistic part was how none of her friends were angry with him for constantly cancelling on her. Women/girls are not like that. If my friend's boyfriend would do that to her I personally would have gone to him and given him a piece of my mind.

A lot of videos list this show as "girl falls first but guy falls deeper", which I personally feel is totally untrue. Even if the last few episodes she runs to the airport to his city again to tell him how deeply she feels for him by showing him the "folded stars". Throughout the story she is proving her love for him. Yes, I will agree he takes some major steps for their future but I personally feel it's too little too late. By that time I am already convinced that "he is just not into her".