Who are you: School 2015 (Kim So-hyun)

The Kings Affection (Park Eun-bin)

Bride of the Century! Not twins but doppelgängers and plenty of melodrama.

The show that comes to mind which includes the doppelgänger element is Mask.

It's not my favourite trope, so I don't have any to recommend but there are :

- The one that has never been released Genesis.

-Your Honor with Yoo Shi-Yoon who plays a criminal who takes the place of his Judge brother.

-Are You Human with Seo Kang-Joon, it's a human and a robot.

-My Holo Love with Yoon Hyun-Min, it's kinda the same but with an AI this time.

-School 2015 with Kim So-Hyun

-The Crowned Clown with Yeo Jin-Goo, I really liked this drama. It was beautiful (a remake of the movie Masquerade)

The Crowned Clown is great and has one of my all time favorite characters, Haksan played by Kim Sang-kyeong! Both he and Yeo Jin-goo were just killing it in these roles.

I also enjoyed My Holo Love, where the ML has created an AI that looks exactly like him and is also a major character. I don't think the drama stands up to a ton of scrutiny, but was a really fun watch and was quite quick.

Both of these are robot dramas where the robot is made to look just like a human:
I Am Not a Robot
Are You Human Too.

Bride of the Century is one of my favorites. I love it.

Train

Switch

Rooftop Prince

Does Kill Me Heal Me count? There are no hijinks more delightful than Ji Sung and his OPPA!

Hmmm.. does Master's Sun count?

When I read the title, my first thought was Link: Eat, Love, Kill and Beyond Evil, but they were fraternal twins.

So The King: Eternal Monarch had doppelgängers, but I wouldn't recommend it.

Who remembers the twin wreck at the start of warm and cozy!

You Are My Spring's Ian Chase and Choi Jung-min is the current foremost. Yoon Park did a good job with this two characters.

Another twin drama I enjoyed was Ruby Ring. Played by Lim Jung-eun and Lee So-yeon.

The creme of the top will be the well done doppelganger The Crowned Clown. Yeo Jin Gu did wonders portraying polar opposite characters. You can tell crazy King from sweet King, anytime.

I think Alice counts, not twins or doppelgangers but different dimensions. But it was really bad that i wouldn’t recommend it 😂😅

My nominee:
OCN’s DUEL (2017). Tour de force performance by Yang Se-jong playing 3 parts: clones Lee Sung-joon and Lee Sung-hoon and their creator Lee Yong-seob. One could argue that he also performed a 4th part when the story called for one clone to impersonate the other. Unfortunately I originally watched DUEL on DramaFever and have no idea where it is legally available which is a shame.

Bonus. DUEL was my first Yang Se-jong drama and made me a fan for life. A video of his 2017 audition for DUEL is available on YouTube.
Enjoy:
https://youtu.be/lDLJkGejO60

My first thought was "School 2015"

Then "Are You Human, too?"

Followed by "Kill Me, Heal Me"

"Rooftop Prince" should count, also.

I love Twins and Doppelgängers but for all that, I'm gonna have a hard time reccing anything since the one that will be most recced is The Crowned Clown, which is my most hated drama of all time and I cannot recommend it in good faith to anyone, because of why I dislike it so much, despite Jingoo as the King especially being so phenomenal lol.
And yes I'm fully aware of being the odd one out for that right now.

I'm also actually suprised nobody has mentioned the other famous twin drama I infamously dislike; Circle, lol.

So I guess I'll just say Your Are My Spring, which I adore, despite all its flaws, and would recommend for basically any reason.

Not a recommendation but just twinsies things that should've happened or I'd like to see:
I still maintain that Kwak Dong Yeon should've played both brothers in Vincenzo, twins or no, and as such now desperately need KDY as doppelgangers or twins in *anything*.
TCC made me want Jingoo to play every character in that drama, and since he's now played Twins essentially THREE times, I think we all deserve the Jingoo X Minjae Twin pair up we've all been waiting for.
Honestly I'd love to see basically any of my favourite actors play twins so, Ziggy, twin drama with yourself when????

Yes!!!!! Yang Se-Jong, Yang Se-Jong and Yang Se-Jong as Lee Sung-joon / Lee Sung-hoon / Lee Yong-seob in Duel!!!

How has no one mentioned this?!? Oh, wait, someone did. 😆

First that comes to mind is Mask with Joo Ji Hoon, Soo Ae and Youn Jung Hoon. YJH was very appealing in this drama which makes me forever lament why he does not make more dramas or movies. 2D1N is only where I see him and I know he can take in more roles like Min Seok Hoon and even Vampire Prosecutor.
Bride of the Century is another good one with doppelgangers. Its light makjang but I really like Lee Hongki in this and the FL Yang Jin Sung was also good.
One the Woman I found the show really entertianing because of Honey Lee. And she did well portraying both characters that you can tell which is which since they were polar opposites.
Kill Me Heal Me JiSung was amazing in this and it has my favorite twins.

All the recommendations are serious, so I'm going for silly aburd fun chinese romances : *Time to fall in love* where the ML is very nice and patient, and *Nothing but you* where the ML (the same actor) is rather toxic and manipulating.
These are not work of art, but are entertaining. (and that's my guilty pleasure)

Don't know if it's been said yet but my ABSOLUTE FAVORITE is

Duel

Not twins, not doppelgangers...they're clones!

Sung Dong-Il & Lee Il-Hwa in the Answer Me franchise takes my vote for the best doppelgängers in kdrama history

Is it possible to have a post on dramas without the breakup arc?

I may recommend "the Duo", it is not exactly a twin/doppelgänger story.; However it tells the story of switched children and is a rare saguk happens outside the palace

DUEL.

Kim Hyun-joo in I Have a Lover, her second outing with Ji Jin-hee. 50 episodes long, but a nice popcorn watch.