I enjoyed, I enjoyed watching IU. Yes, that's it I enjoyed watching her in the subtle and dark storylines.
Because there were 4tales of only 20minutes it's difficult to connect to the story. stories are like short stories I used to read in my school days, it is not engaging but watchable.
But the depth of IU’s acting is surreal. She looks gorgeous in every role. She has great acting skills portraying different kinds of aesthetics and living up to it.

I hated her in the first story.
I was scared of her in the second story.
I admired her in the third story.
I liked her in the fourth story.