While You Were Sleeping (2017)

Not similar in plot line at all, the only reason I think one might like this as well is:
-same writer for both shows
-well-written second male lead characters
-If you like Suzy, she is a lead in both
-Beautiful cinematography

Character(s) have a supernatural ability to predict the future and use that knowledge to save lives. Mystery/crime and romance elements.

The ability to see through the future by the female lead is the main similarity betwen both the dramas, while the male lead helps her to go through these situations.

If you like detective series then you also like "7th grade civil servant". A love story of two person who once started to date but some circumstances aparted them away. But but after their Reunion, very interesting love story, detective part waiting for you.

A main character with a supernatural ability. Mystery, crime, courtroom, and romance elements. Also a main character is a lawyer.

A main character(s) with a supernatural ability who uses it to try to save people. Mystery and crime elements.

FL seems to see future in her dreams, then she came into contact with two more guys one of them is ML.
ML helps FL to avoid the scenarios which she saw in her dreams.
- Mystery, fantasy and romance.

Both FL are reporter
Both ML are in the law inforcement (one a prosecutor the other a cop)
The main character are related due to an accident that happened in childhood
There is a love triangle with a nice 2nd lead that isn't toxic.
Supernatural element (One ghost and possession the other seeing the future)
Both have nice romance but it isn't the main plot.
Both have a sort of bromance.
Overall they have a similar vibe while being their own style.

These dramas in my opinion had a similar vibe to them
* Bubbly ,vibrant and headstrong female lead
* Protective and lovable male lead
* Comical supporting characters
* In both the main leads are destined to be together
* supporting parents or parent
And overall if you enjoyed Melting me softly i'm pretty sure you'll like While you were sleeping :)

Both of these dramas involve dreaming, and have supernatural elements. Dreamland is more Inception-like, however.

They are both set in a korean prosecutor office. Both focus on crime. WYWS can be a little on the fantasy side though .

Both have a Character that can see parts of the future, but doesn´t quite know how to influence it - this plays a bigger part in "While you were sleeping"

They both have a undramatic Love Triangle, that resolves itself.

Both dramas had one or more character having the abilities of precognitive dreams and for at least one or more of the characters, the dreams manifested into nightmares. Both dramas have the characters who had the precognitive dreams trying to change the outcomes of the nightmares that they had seen in their dreams.

Both are supernatural.
In While You Were Sleeping the female lead sometimes sees people dying in her dreams.
In About Time the female lead sees the life clocks of everyone around her.

Both drama is fantasy romcom and both remind me of each other maybe bcus of the characters, FL is weird in both drama and really hitting on the ML in the hard way LOL also with the ML who look clueless/innocent but actually really courageous..