I don't feel like the supposed main couple has even a little chemistry, sorry, they really fell in love instantly and don't even look good together.
I think the beginning is too slow for my taste, I feel like they tried to establish the characters, but none of them are interesting enough to capture my attention or sympathy.

The story has potential, especially with the Japanese invasion theme, but I feel it is wasted and handled very poorly. It's identical to every other story of the style, I already knew what was going to happen in each chapter before it happened, the dialogues for some reason feel awkward. I was bored out of my mind while watching it, but my friend forced me to watch it to the end.