I would love if it had additional time travel or body swap or any other fantasy element to it.
Romance doesn't need to be at focus. Mystery thriller should be the important part.
Ending should be conclusive and either happy or hopefully happy or time skip happy ending and shouldn't feel rushed. I hate open or ambiguous ending (so please don't recommend any such of those).
-Eg of k drama endings which i prefer the reccomendation to be closer to -
* Tunnel - while ending could be better, but it is acceptable level.
* Welcome 2 life - i dislike the other timeline ending not being explained, but rest was fine. So still acceptable.
* Reset - it a c drama, but ending acceptable even if it had few problems
More Prefered/ideal ending would be something closer j drama like "Erased" or even better "Alice in Wonderland"
-Eg of k drama ending which i don't prefer recommendation to be closer to -
* Flower of Evil - please no amnesia crap at the ending especially no anguish time skip (another eg of crappy anguish time skip ending is Pinocchio). So please don't rec me discount happy ending which come at last sec after a huge time skip dedicated for anguish
* Train - another eg of ending with anguish time skip using a last minute plot twist.
* Squid game - please no sequal bait or tragic ending like this