Recommendations

These two shows gave me the same fuzzy warm feeling inside! If you loved one, I feel safe in saying you will like the other, even thought they don't have much in common plot-wise.
They do share the same type of feeling and idea - watching two people slowly fall in love, completely and irrevocably, and once they are there, never waver.
Both couples are extremely adorable.
Both of these shows have the main characters surrounded by great friends and family members.
And both of these shows are #relationshipgoals and OTP!

I absolutely loved this one. Starring amazing actors, this will get you on your heels.

They are based on the same novel. If you want to watch this drama I recommend watching The Romance of the Condor heroes first, I loved it, I hope this one is up to it as well.

Flamboyant, funny female leads experiencing life in the countryside (farm). Great comedic performances by the female actors.

Voice is a fantastic police drama. The same chanel that Tunnel.
If you like adrenaline and police mystery with much suspense, I indicate watch Voice.
You will like it from start to finish.

This drama is fantastic and romantic, but is not cliche.
The man is cute and girl afraid of relationships.

All involves three siblings separated when they were young due to the death of their parent. They met later both have desire to get revenge

Both give a similar feeling and main character development is kind of same.

A adaptation of same history based on the novel "Boku no Tsuma a Kekkon Shite Kudasai" by Takuji Higuchi (published on November 15, 2012 by Kodansha).

same feeling... guess while watching signal the writer of tunnel thought- wouldn't it be better if the cop came to the future himself rather than just talking through a walkie talkie.
almost similar dramas

Even though both dramas contain different characters and different storylines, I find that the romance between them give off a similar vibe, as well as the main leads.

both strong (in SWDBS quite literally) woman who stand up for themselves, both deal with a big crime(s) and have serious tone while also having at the same time this lighter more humor/comedy tone which creates in both a good balans. Also the male leads are both equally adorable (just like the female leads) and have a lot of cute gestures/actions.

In both dramas:
-The male lead has lost memory and is taken care of by a girl, their family think they are dead.
- Both male leads are kind and cute.
- Good chemestry for the main couple.
- The male leads are from rich families.
-The female lead loses someone of her family she loves at the beginning.
-The female lead is much stronger than she seems at first sight.
-There is someone who wants the male lead to disappear because he wants to take his position in the company.
-The supporting characters are interesting and appealing.
-The female lead ends up working at the male lead's firm.

Points of divergence:
- In SKL, the guy loses the memory once whereas in STLDFM, the guy loses his memory twice, and falls for the female lead once again.
-In STLDFM, the second male lead falls hard for the female lead, whereas in SKL, the love triangle is less highlighted.
-In SKL, the couple is more childish and it is a comedy with a light storyline.
-In STLDFM, the story is more tragic, the storyline is heavier than in SKL but there are still some comedy elements.

I loved STLDFM better because of the casting (Eugene and Ji Sung fan) and the storyline. We really felt the love all along this drama. (I am a bit sad to know that later on he married the girl playing the female rival of Eugene, and not Eugen herself????) Both dramas are good even though STLDFM is older, but in my opinion old dramas are the best because modern dramas lack something older dramas had. If you want a light drama, watch SKL, if you want to witness the birth of a "once in a lifetime and strong love" conquering all, watch STLDFM.

they have a similar genre and story, both are great movies!
both movies is focus on conning.

The plot is quite similar based on revenge and how the guy falls in love to the lady who he thinks killed his fiance.