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The female lead has a similarly cold and distant personality before meeting the male lead, who helps her open up and overcome her fears in relationships.
Recommended by Aria - May 10, 2017
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both present the situation of an extremely capable woman in times women had little to no perspectives on getting an education and using it for the common good. They aren't greedy for power, but want it to save the state or improve the quality of ordinary people's lives. Their idealism comes in pair with an acute political sense. Even though they're surrounded by the men who love and admire them, their advice is often disregarded, their possibilities limited and their lovers would gladly just put them in a cage so they wouldn't get hurt. You got your fun, girl, now go home and let the boys play.
Both are gender-benders (short arc in Empress Ki, more in Tempest) and hide their identity. Both have multiple love interests. Both become a ruler's concubine. Empress Ki has stronger rivalry in the harem, while in Tempest even though the harem is a scene of a financial schemes, women are in comradery.
Recommended by namopanik - May 10, 2017
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both shows are about the afterlife and what these characters did in their past cause them to be who they are now.
both leads are handsome as hell!
both dramas have ghosts in them.
Recommended by fatma - May 9, 2017
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The male leads give off the same vibe. Lie to Me the male lead is a bit more stiff. The female leads are somewhat similar. Also the second male leads are similar. My Secret Romance is like a more light hearted version.
Recommended by Unnie25 - May 9, 2017
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Same theme ..a young guy getting accused of a crime he didn't commit ...fabricated city is more action ..new trail is more emotional .
Recommended by coolcancerian - May 8, 2017
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One is a Korean movie and the other a Thai drama, but both have a hitman who falls in love with an innocent woman who's an artist. (And both are awesome.)
Recommended by Akaisora - May 8, 2017
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Its also a mermaid story. Bt much bettr than " the mermaid". The only thing is its a Korean drama
Recommended by Anjaly - May 8, 2017
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Both series portray real people and real stories. It's a fresh and genuine perspective on the lives of gay men.
Recommended by Aurore - May 7, 2017
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Both dramas involves two non-relatives twin women (rich woman and other is poor from each drama), of which the rich woman from each drama engaged to the son form rich family but for business purpose and not real love but later on due to different reasons the poor one forced to be married to those chaebol sons and replaced the rich ones. In bride of century JYK didn't want to be married by CKJ so NDR replaced her. In mask, due to the coma happened to SEH and killed by her in-law, she was replaced by BJS. Both those sons from each drama had no feelings to these poor women in first place but falling for them later.
Recommended by Caroli Zfn - May 7, 2017
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both are about a forbidden love story between a man and a married woman.. both have r rated scenes
Recommended by RaRa - May 7, 2017
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it have almost the same names. It most the same exact same thing.Also both have powers.
Recommended by kaitlyn - May 7, 2017
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In both dramas a baby is left with multiple men who could possibly be the biological father and take care of the child together.
Recommended by aria - May 7, 2017
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It has a Veryx100 similar plot and any person who has watched 'the promise' would straight away realise the similarities between the two dramas.
1.Both leads lose a parent
2.both also have a biological parent without knowing
3.get betrayed by boyfriend who chooses another women with the intention of becoming successful
4. Lose a child
5.revenge begins ,to take down the whole family and take over the business.
Recommended by IY4_ - May 7, 2017
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Both dramas feature time travel to a different era.
In Tunnel, granted it is just from 1986 to present.(still a big culture shock)
In Faith it is to the Goryeo era from the present.
Both bring a little star power with their Brave and Manly leading men.
Faith's cast is lead by Lee Min Ho playing a General of the army and bodyguard to the King.
Tunnel's cast is lead by Choi Jin Hyuk playing a tough Detective who is not afraid of tackling a dangerous criminal. He is also a respected sunbae for his less experienced partners.
Both have a lead who is faithful while longing for their loved one after being separated by time.
Both are directed by Sin Yong-hwi
Both are really good dramas worth watching.

Where they are different:
Tunnel has a serial killer crime story and slightly dated outfits.
Faith has political intrigue, medicine, and of course the long hair and historical dress.
Recommended by kdramasinpajamas - May 6, 2017
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Another gumiho story with the star lead as lee sung gi.. Really good...
Recommended by Anjaly - May 6, 2017