Recommendations

Both dramas where the main lead will go to great lengths to get his revenge. Includes manipulation and death.

both are similar in a way that it deal with political corruption and revolve around lawyers, court etc. acting from both dramas are superb, especially by those villains. love both male & female leads!

both are crime related dramas with not much love line going on and interesting plots! korea's crime dramas are getting mainstream nowadays but these 2 are the better ones out there. for signal, the highlight is the walkie-talkie while for voice, the highlight is that the femlead can visualise sounds.

It's a story of a young woman seeking bloody revenge on a psychotic man who killed a member of her family.

Unique setup in both of these dramas where there isnt really a primary "main character". The characters in both of these dramas end up having backstories of their own in a slice of life setting. The only difference would be that Prison Playbook kinda has more of a main character, but hes in the background of a LOT (tens and tens) of other people, which he will soon find out their stories as well

-They both have a CReEPILY similar vibe, despite the plot being totally different
-They both take place in a very new, modern, brightly colored and unfairly spacious boarding school (although, Kim Bok Joo's is a college (so, duh, they live there) and To the Beautiful You's is a boarding high school)
-The best friends are the best part (side only to the romance if you're more into that thing)
-Both revolve around the main characters' sports and a primary plot line is training or overcoming some (or several) sport obstacle(s)
-They both feature rhythmic gymnastics as a sort of side plot (and the participants are always the mean girl)
-Both have a strikingly similar ratio of humor to drama; the humor being of the same type/style, and the drama relating to the mother of the male lead
-For some reason the school's doctor is a friend/somewhat needed side character that falls in love with one of the two lead's siblings
-Even the originally bad characters become lovable
AM I THE ONLY ONE WHO SEES THIS??

They're both about comfort women and the horrific ordeal they went through. Spirit's Homecoming, however, is much more graphic when describing and showing the abuse the young girls were subjected to.

One is a mashup of classic Japan/epic samurai stories and sci-fi, the other a real life version of old school rpg games, and they share the same brand of silly fourth-wall-breaking humor, the same way of making fun (in an affectionate way) of beloved classics and the same way of mixing up ancient and modern. They're different stories but have a very similar vibe!

Very different plot but better story. Way more complicated in all kinds of ways, longer, sadder, worst?
Same actor: Lee Joon gi~ but acting all the other way different. Em, dark prince? Probably suits him more.

SIgnal and Tunnel have superficial similarities. Both are investigative stories with thrill, mystery, suspense, and a time-travel theme in the plot. The 80s is a main time period involved. The acting and music of both shows excellently support both shows.

However, it is because of their differences that I recommend Signal and Tunnel to one another. Each show has their own unique use of time-travel. Their particular time-travel comes with its own limitations and difficulties for the protagonists. Our protagonists’ emotional connections and their interactions with their world are also different because of their particular time-travel.

Signal is a leg above Tunnel because of its tighter plot. Signal’s suspenseful pacing is more gradual, building the tension straight through to the end. Tunnel, meanwhile, has a more episodic cliffhanger thriller pacing. Oh, and Signal has to deal with corruption in its conflict. At least the cops in Tunnel are good cops.

These things made me enjoy Signal and Tunnel as a pair. They have some fundamental differences, bust enough similarities to point out that Signal and Tunnel are two well-made investigation and detective shows that use time-travel well and make it their own.

Both variety programs are from YG, except here two teams, team A (Winner) and team B (iKon) compete for a chance to debut. It's the prelude of Mix & Match.

Mix & Match is also a survival show, a YG one to select the final lineup for YG's new boy group iKon.

Both have the same leads but different stories. They main couple have many issues but love each other more than anything and do whatever they can so that can stay together.

Stray Kids is also a survival show, a JYP one to select the final lineup of members that will debut as the new Boy Group from JYP.

Idol Producer is the Chinese version of Produce 101: Season 2 with male contestants which aired in Korea in 2017.