First half:
It was like a comforting smell of pavement after a rain. It really represents what this drama was supposed to be about. The simplicity was its biggest strength

Second half:
It was like a humid room without any window. The major conflict that was introduced to keep the show interesting felt so out place. It lost its essence by making things too complicated for the leads

The leads didn't have an ounce of chemistry. Usually having the same personality means they're compatible but with the leads' case, they were too similar that they kinda repell each other like magnet