Recommandations

Both involve a person, strugling with an illness that doesn't seem treatable. In Both the mains meets their partners in the middle of the battle and the discovery. Both they and their partner are scared and make some questionable human choices. Both treat the illnesses with respect, while adding some love and a possitive humane angle of the issues. Both dramas deserve better recognision.

Both involve a celebrity and his relationship with his bodiguard.

Both involve a young woman which's life suddently turns in such a dirrection that she has to take care of few children, which aren't her own. She has to lie about her life and live into a rich man's house. In those dramas the male leads are somewhat agressive towards the female lead as they suspect her honestly loving them (which was the case at the begging).

Splash Splash Love is the abridge fictional version of this in 2 short episodes the meaning and motives behind the creation of Hangul will changed because of a time traveling girl. If you like watching toned down "fictional historical" this is the show. This show is about King Sejong as well.

Both are Gong Hyou Jin dramas that involve her heroine's slowly growing professionally in the same industry as her love interest, who happens to be quite a jerk. Both man are obssessed with their profession/professional skills and ideals.

Both have very strong female leads who can have a tendency for violence. Ae Ra and Dan Ah both get screwed over a lot, but work hard because they want a better life. The humor is similar. Both dramas will make you laugh out loud one minute, and then cry the next.

Similar graphics, similar plot lines (evil vs good etc)
Guest appearance from previous installment (King from the KO class and others) Stars the Spexial members.

(Re-post from the original version of this drama's page)

Female lead is not only the same actress, but the characters are suuuuuuper similar! Cheerful, optimistic, etc etc.

Supporting female is also similar: Rude and obnoxious model/actress who become likable.

(Re-post from the original version of this drama's page)

Main leads have met before, male lead does something nice/significant but only the female lead remembers/knows.

So I don't give away any spoilers I'll be as vague as possible:

The feuding male characters are similar in both dramas.

Male lead has a hot temper, is controlling and he has a jealousy issue.

There are probably more but I'll leave them alone =)

(Re-post from the original version of this drama's page)
Almost the same story line, normal girl meets and does something significant for her boss. She asks for nothing in return which causes her to catch the bosses attention and things proceed from there. There are even identical situations in these dramas. Main differences are the best friend and the female lead has a secret she's hiding from the male lead!

Female lead is not only the same actress, but the characters are suuuuuuper similar! Cheerful, optimistic, etc etc.

Supporting female is also similar: Rude and obnoxious model/actress who become likable.

Main leads have met before, male lead does something nice/significant but only the female lead remembers/knows.

So I don't give away any spoilers I'll be as vague as possible:

The feuding male characters are similar in both dramas.

Male lead has a hot temper, is controlling and he has a jealousy issue.

There are probably more but I'll leave them alone =)

Almost the same story line, normal girl meets and does something significant for her boss. She asks for nothing in return which causes her to catch the bosses attention and things proceed from there. There are even identical situations in these dramas. Main differences are the best friend and the female lead has a secret she's hiding from the male lead!

both drama Life and School 2013 are about the bullying in school and true friendship .
if you like school drama you will definitely like them both

Both story take place at the same period of time and deal with resistance against japanese occupation. The relationships develop in a quit similar way. The lead person goes undercover and sacrifice things for the mission.
I felt like Rookie Agent Rouge is a kind of female version of Bridal Mask.