Recommendations

Both dramas have the same investigator and culprit in a cat and mouse chase. It gives that similar vibe for me.

The only difference is that Tunnel has a time travel element but Hello Monster does not, but deals with something in the past as well, but no time slip to complicate it than it already is.

Different stories but the main couples in both these shows have mad chemistry. You'll love the main couples more than anything else. Also the male leads went through a tragic experience and are helped by the female leads.

both stories are revenge type of plots and two of my most favorite revenge lakorn so far. i loved how the male lead loved the female lead unconditionally despite the deceit.

Both have strong female leads who don’t give into society’s standards which are ruled by mostly men, both are work related, Ms. Temper & Nam Jung Gi being mostly centred around how women are treated in work places and about sexual harassment towards women, Best wedding is about becoming a single mother and how ‘immoral’ that is without having a man as your husband.

Both are fantasy drama, related to God, rippers, and main leads are fantasy characters, lead actress is a human, demon/god fall in love with human, in both drama lead actress can see ghost from childhood.

Sound of the Desert is similar to Eternal Love in that:

-Female lead is in love with someone else first.
-Male Lead is completely in love with her and is super open about it. Affectionate, wicked, naughty.
-Second female lead is super hateful, although in SotD the second female is not in love with the male lead.
-Passionate kisses, although in both the romance takes a while to start.
-There's no magic or fantasy in SotD
-The male leads always wear black.
-Overall the romance gives the same vibe.
-There are a few more similarities but I feel they would be spoilers.

dream high is similar to entertainer i feel like because they are musical students that go to school and go through hardships but end up having fun and falling in love

I picked this drama as something that is similar in a sense
that the charters work in a hospital and they have
obstacle in their way from work and love .
but that also does't mean that they aren't Good at
what they do and aren't Good for each other .

A dectective series also about trying to bring down a grandfather and son (in law) out of power, a lot of past involved to solve the current cases, main lead boy changed name because of family murder cases

-Both are crime dramas
-Very similar vibe
-Both follow the main character (who is a young rookie detective, still holding onto his dark past involving the police versus criminal-minds-esc bad guys, and because of this he often lets his emotions control his actions and judgement) and the other characters on his detective team while they work to solve many major crimes and cases (roughly 6-8 throughout the season) that lead up to solving a major case
-(Signal works with cold cases and Hidden Identity just works with cases revolving around a mysterious person named "the Ghost")
-Both feature 1 badass female on the team who's past is also dark, mysterious, slowly revealed throughout the series, and affects her judgement (although less than the past affects the main character)
-You fall in love with every single character on the team - no matter how small their roles
-The dramas do not shy away from tragedy, violence and heavy/dark plot twists
-There's always that "there's something else going on here" vibe
-THE PLOT TWISTS THO. ... yup. Imma just leave it like that.
-The acting is INCREDIBLE. You will cry. Multiple times, probably. It will hurt. But it is amazing
-Both make you wonder, "what kind of sick, twisted, brilliant, talented person could come up with/write this plot??"
-No romance... (technically)... Trust me, you don't need it.

Both dramas have romantic fantasy genre where the female lead can see ghosts. The male leads are also not human - in Goblin the male lead is a goblin and in AKO the male lead is a demon.

They both include supernatural beings and trials they must go through. Also includes romance. The difference is that Eternal Love is historical while A Korean Odyssey is modern day.

A love to Kill is a very very underrated drama. It is also a brilliant makjang about revenge, mind games, complicated love etc.

both of the main characters live in the same building, both dramas have business, romance and comedy genres.

Both dramas have a topic about infidelity. Both dramas make you think about the meaning of marriage, family, and self-identity. Both dramas are the types that make you think and introspective. It's not necessarily entertaining but make you wonder. The story are realistic and can be relatable. The difference was in Dakara Koya, the female lead was cheated by her husband whereas in Anata no Koto wa Sore Hodo, the female lead is the one who was cheating.