I felt like this drama had a really strong start — the female lead's spunkiness made her really likeable, the mystery was intriguing, and the time travel also made for really interesting parallels.

As the drama went on, I felt like it a lost a lot of its spark, opting for either humor or a modern-only plot, leaving the saeguk mystery and time travel element both really neglected until the last episode and not really tying the two timelines together well enough. It didn't make much sense what Yeon-woo's time travel had to do with the modern storyline, or why those parallels even existed. I think the stakes weren't established well enough for me to feel emotionally invested: I paid painstaking attention to the modern day characters to figure out how they were tied to their past lives, but by the end it felt like the modern day characters were the far more important ones. I really think this drama could've used a full 16 episodes to balance out the modern and historical plotlines and add some explanation for the time travel.

Other than that, I felt like the side characters were fine and occasionally funny but pretty unimportant to the plot, and the main romance was also fun but generally a cookie-cutter ship. It's a fun watch but for me, not very memorable.