I absolutely loved this drama. It hooked me in from the first episode which is rare. I laughed until I cried. I cried at some points. It moved me. The writing was excellent. The solution to the mysteries was not telegraphed to you way in advance. I hope Ji Sung won an award for this because he deserves it. I have re-watched this drama more than once and that makes it worth a 10. II shudder to think what would have happened to this drama if the role was given to a kpop idol who can't do anything but act cute. This role required emotional depth and he brought it.