if you are appreciating a character full of layer and emotion to overcome their struggle in the workplace world ala Misaeng, but with a darker tone, you might be like this drama alot. Who said a love story can't mix with realism and as your way of telling a good message ala THe dancing the waltz alone?

Once again, not alot of writers is dare enough to throw character reggresion/redemption on viewers .  The character struggle in here is real and the writers write her/his own character with heart,  and far from conventional drama we are used to. They are  trapped in their own anxiety and fear due to the pressure from the world they live in. The plot never defined what path you should take, more about the result decision in your own making.

The metaphore between the waltz dance and relate it to their relationship is just a billiant touch from the writers.