I enjoyed watching this drama. There were scenes I laughed at because of the irony, which is a nice addition to action and tragedy, in a way only k-dramas can do successfully.
However as a person who struggled in the past with depression and s**cidal thoughts, I found this way too preachy. It completely disregards mental illness and paints it as a choice. I also found the ending cheesy, predictable, and undeserving.
The support characters could be more developed but they were really good and the choice of actors was spot on.