What is the most creative , original Kdram you ever watch ?

I'd like to add "unusual" as well to the definition.

"Mr. Queen" was quite creative I felt like, although it's based on a Chinese story "Go go princess". The idea that a man's consciousness travels back in time and into a woman is quite intriguing and gave me many funny thoughts :)

"Hi Bye Mama!" I thought was very unusual and creative when I first watched it, but it's a sad drama of course.

"Oh my ghostess" as well, quite fun.

In your list I've watched and agree with

"W" and "Hotel del luna"

Arthdal Chronicles! Very creative and very well written. It's my favorite show of all time, you should give the first two episodes a try and see if you like it! 

Original:

• Arthdal Chronicles - very very oroginal in scale, setting and world building. 
• Live - police officers setting with characters starting at the school fpr police and develop into their assigned station. It has an  unusual FL with bad past trauma but functions as a normal person with good coping mechanism, relatively to other FL who either are sevetely damaged or so chipper and goody it kinda is an eyesore. It also has an atypical romance with no alpha male, just good old normal guys you probably knowin your normal days
• Hospital Playlist - even if medical dramas comes in loads, the concept of hospital playlist with 5 main character, that has their different departments and specialtiea to showcase... and plus chaebol character who actually are innately kind and charitable, or another who actually hates fighting foer their parents big company
• Queens classroom - even though this is a remake from a japanese drama, the original part of this drama is with regaeds to its characters: this drama focused on one adult MC and most of the story revolves around kids. For school setting that doesnt deal with high schooler or college students, what yoi get here are kids .
• Misaeng - office setting  that doesnt deal with romance  and superficia office setting. This feels so realistic that you can see the struggle of what it is to be a newly minted adult thrust into the big bad world.
• Prison Playbook
• Papa
• Non Korean:
  • Hikaru No Go
  • Mr. Hiragii's Classroom
  • The World between Us
  • Hanzawa Naoki
  • First Half of My Life

• Abyss (2019) A man and a woman who tragically die and are given another chance at life through soul-reviving marbles in a magical abyss.
• Crash Landing on You (2019) One day, while paragliding, Yoon Se Ri has an accident caused by strong winds, leading her to crash land in North Korea, where she meets Ri Jung Hyuk, a North Korean army officer, who agrees to help her return to South Korea.
• My Girlfriend Is a Gumiho (2010) One day, Dae Woong visits a temple and accidentally sets free a Gumiho, nine-tailed fox, who was trapped in a painting for 500 years.
• The Beauty Inside (2018) Han Se Gye is faced with a strange occurrence where she must change into a different body and new identity for one week a month.

 Yukina Aizawa:

Thank you for your answer. Yes indeed unusual is also a good term. 

I don't know any of TV show you write but I read the synopsis and indeed it's seem interesting and original. 

Can you explain why you tough "Hi bye mama" was creative? I read the synopsis but I would like to have your opinion. 

Hi bye mama ! explores the ramification of someone coming back to life, and I found its take on it quite intriguing, real and emotional.  

Abyss is similar in a way, coming back to life concept, but is more of a thriller instead of Hi bye mama being an emotional drama.

I agree with The Beauty Inside, it's a intriguing concept. I liked the series more than the movie, but the movie was good too.

Queen In Hyun's Man is also interesting, a time travel kdrama.

Indeed beyond evil is really interesting. It start like other thriller but it was so interesting because they make you doubt does the ML is guilty or not.  I watch a lot of thriller and this one was written differently. 

I  love while you sleeping too. 

I'm agree for "Extracurricular", I start it without knowing the story and realize it was different of what I'm used to see, by the way you remember me I need to finish it ^^

Extraordinary You.

It's a similar concept as W, but a high school series where few students realize they're actually characters in webtoon/cartoon.

The same director as for True Beauty.