one of the best time travel dramas!

I loved this kdrama! I just finished it! It has the right amount of drama, mystery and intrigue!
The performances were incredible, a well-written script, as the chapters go by you feel more committed to the plot!
In the end it was very appropriate, I was happy ?✨
I know it wasn't a romance drama but I really liked the two couples they introduce us to, I loved a plot list in particular that happened almost at the end ?
The ost is simple but it has beautiful songs! Beautiful scenery too! ......