You should watch DKDKTV’s review on this.
https://youtu.be/FUV_xWDDMvo

This show really sucks. Mainly bcs it is so tone-deaf. It appears as really sophisticated and smart but when you watch it.... it’s really not that deep lol. It’s pretentious and shallow.

Irks the heck out of me when dramas try so hard to be something they are not.

The saving grace is Woo Do Hwan, like for real. Don’t bother watching scenes he isn’t in. The whole parallel world thing might also keep you intrigued for the first few episodes? After that they keep overusing it in an attempt to make it fancier that you wont be amused to it anymore haha.

Frustrating watch, leaves you hanging. Only reason I watched the whole thing bcs I kept trying to figure out why is it so bad and I kept hoping something will turn round to make it better