I took my time watching this drama but overall it was pretty good! The story was good, the acting was good and the plot twists were good too!
I'll start with what I didn't like (which isn't much actually):

-The female lead flip flopped with her feelings way too much. One minute she liked the male lead, the next she hated him, the next she liked him, the next she hated him. Luckily this only goes on for a couple of episodes.
-In the beginning the second male lead comes off as pushy and strange in the sense that because he likes the female lead he somehow has the right to be weirdly possessive of her.

What I did like about the drama:

-The time travelling plot was a great plot device to contrast between the two different worlds they go between.
-The character development in this show is really spectacular. They do it in a way that doesn't feel forced or rushed. The female lead's character development was my favourite because she goes from being harsh to being patient and warm hearted.
-I don't usually cry but this drama made me sob!
-Although there were parts that were hard to watch because of how painful it was, this drama is mainly light hearted and funny. The male lead embodies this and it's what sticks out for me about the drama.