A lot of care and effort was put into the writing to craft the characters and their interpersonal dynamics and it pays off nicely. I really enjoy how Woo Yeo isn't a cold, arrogant, and aloof creature taking out his angst on others, but a polite guy who is willing to communicate as he learns what it means to be human beyond mimicking the cultural customs of the current times, and how Lee Dam is a realistic, messy in a good way young woman who is direct, fun, kind, and never a doormat. It was so fascinating that the story started with their meeting and they had a pleasant platonic connection, but then Woo Yeo changed that in an instant when he went into romantic lead mode and he changed the chemistry between the two. I really like how the show continually develops their relationship with their interactions and understandings about each other, really building things up to lead to an organic romance. They actually get spicy too, which good for them.

It's nice there is no grand makeover, but Lee Dam's clothing style subtly gets more sophisticated while still her own comfort based fashion taste, changing from the influence of the perpetually smartly dressed Woo Yeo (other than the times he's in disguise) and with the colder season as well. The show utilizes the side characters well in a way that supports the main story or at least doesn't take too much time away. Lee Dam also has the chillest kdrama mom in the history of kdramas. A literal cool mom that works overseas, sends her daughter the latest fashions, and happy to see her daughter cohabitating with a hot, rich guy.

Sun Woo's relationship with his sister is pretty funny and his character gets to learn and change and it's pretty sad that he gets entrapped in the game of a supernatural diety while minding his own business really. It's great that both he and Lee Dam were able to mutually sever the red string of destiny through their own individual choices. The revelation of the D plot of Soo Kyung's hidden beef with Jung Seok was so funny. He didn't intend to mistake her as the professor and hand out prints of her love letter of her then crush to the whole class, but I get why her grudge would last three years. All of the friendships and sibling relationships are very well done. Woo Yeo and Hye Sun have been there for each other so long they are basically bickering siblings.

While most of the story has been pretty well crafted, it's eye rolling that the writers went to the ultimate cliche of having Lee Dam run into traffic to have Woo Yeo sacrifice himself for her. And no one checks on the poor truck driver who must have hit their head and passed out because they never left the truck despite stopping. Aside from that the ending takes it's time to tie up the multiple storylines it set up and it's well earned because they never took away too much time from the main couple and yet were able to blossom on their own in conjunction with the main plot. That is the drama's strength, making this interconnected world that built up Lee Dam and even Woo Yeo's life and actually having everyone communicating to address the choices and consequences of decisions.