It's okay to not to be okay is one of deepest and thriller drama series I ever watched. Story have lots of mysteries and well connected the past and present scenarios by the director. Character building is also good and as I complete each episode it involves me more into it. About the cast, yes, So yea Ji is as gorgeous as ever in this series and Soo Hyun perfectly played the role of his character as he always do. I like most about the series is how they showed the deepest thoughts of mentally challenged patients and every patient should be treated by proper care and some love. They also introduce us to the darkest desires of a person and how that desires will lead us to become a different person than we used to be.