This is totally on the god-tier kdrama list, alongside Chicago Typewriter and Prison Playbook. Plot? Superb. Casting? Amazing. OSTs? Nostalgic. Chemistry? DUH, I even ship duk seon to dong ryong.
I watched this 4 years ago but still, the sepanx is still there. Thank God the producers produced Hospital Playlist--same feels.
If I can give it 10 stars, I would definitely give 11.