korean dramas that are hidden gems or not well known? (any genre)

Hi, it would be nice if you guys could recommend me a K-Drama that is underrated or a hidden gem.
I've been looking for a K-Drama with a random/unqiue plot that is unlike the main romance, action and thriller ones.

Thanks for the future replies!!

Possibly...

• L.U.C.A.: The Beginning 
• Psychopath Diary 
• Pumpkin Time 
• Zombie Detective 
• The Sound of Magic 
• The School Nurse Files 
• Missing 9 
• Duel 
• Night Watchman's Journal 

Avengers Social club

Amanza

Chicago Typewriter

Class of lies

Juvenile Justice

Hot Stove League

Hello,ME

Live

Life on Mars

Miss HammurabI

Misaeng

Psycopath Diary

Search WWW

+1 School Nurse Files & The Witch's Diner 

• Lie After Lie - Never heard of this, found it by accident and it was pretty interesting 
• The Veil - Seemed to have picked up a bit in popularity but I basically don't ever hear about it. It's amazing tho
• Bloody Heart - Well-crafted and thrilling historical politics
• Miraculous Brothers - Sci-fi mystery that's very interesting so far