It's been a while since I watched a time travel genre Kdrama. But that aspect was not what made me hook on to the show, it's the relationships among the characters. They did an amazing job giving enough screen time to the side characters to have an impact of their own. Liked the development of SML too. Ending was also on point. Some scenes made me tear and some made me laugh.
Enjoyed the journey. I won't say it's the best story-wise but was fun. 'One time watch' kind of show. Give it a try. ????