Healer (2014)

Both are action dramas and involve plot of conspiracy in big companies and government. Both main characters try to make their revenge. Also both meet pretty girls on their way to do so.

Both dramas involve leads that have their lives intertwined by what happened in the past. Both had male leads that have secrets kept from the female lead. The male leads falls for the female leads despite not so remarkable or favorable impression of the female lead at first.

Both secrets from the past are gradually revealed providing new twist. Although, hotel kings plot twist seemed more long and winding.
The male lead will do anything to protect the female lead

The best part of both dramas is the chemistry between the actors who played the OTP .

1)Quirky+charming male lead who is somehow get involved with crimes
2)Strong+smart female lead with her own burdens
3)ML's respected master

both have a very interesting plot and SoundTrack both are legendary after watching the drama you will know, there is so much action on all two dramas.

AWESOME 100%

In both dramas, the protagonist hides his real identity from the girl he loves.

The plot is mainly about revenge , but in Healer the revenge part is developed within the episodes and not from the beggining. It gives the same vibe and the lead female is the same in both dramas.

It follows the same plot of a group/pair of professionals (e.g. a hacker, a con artist) who worked together in order to act out their revenge and take down the bad guys.
They both have a nice blend of humour and action.
I really recommend both dramas :)

Has one of the same actors from Healer. Similar vibe to Healer. No masked characters though. Instead of one person there's a group of people.

Both dramas have several external conflicts that prevent our OTP to be together.
Both female leads are cheerful and hardworking.
Both male leads have chances of 'spying' on the female leads.
Both OTP are lovely and romantic and make my heart flutter^^
Both stories happen during the winter season, so you'll see romantic snowfall dating.

-very good action scenes
- good love story
- main charcter has to hide himself
- main character seeks revenge

overal really good action scenes that will give you a thrive

Both are little mystery anand f full of excitement.
Characters work together to fight against crime and corruption.

The main protagonist likes to help people hurt by injustice..

(Protagonists in the series are from different genders, but..):

- both involve spy shenanigans and fights;
- cute adjumas who help them;
- protagonist have cute ordinary people they want to protect.., but involve in their mess

Ji Chang Wook is the main lead in both the show and movie.
Although it does not follow the same plot of an undercover agent, and instead a gamer framed for murder, it is similar to Healer's 'teamwork' of allies working together to find the truth (including a hacker)
However, fabricated city has a much more serious tone than Healer in terms of action, and a warning of quite gruesome and emotional scenes.
But if your looking for more Ji Chang Wook content or something action packed with good fighting and car chasing scenes i recommend fabricated city.
But if you still want that romantic vibe of a classic kdrama then Healer is the one.