Recommendations

The whole game aspect and betrayal and lies and who in the end is the 'boss' are very similar to each other. Also the atmosphere is very similar!

These two films definitely bare the same feeling of survival and having to betray each other to survive.

Pretty much the same thing; people put together and trying not to die or kill each other.

Similar Concepts:
1)Younger Man and Beautiful Female (If you can understand), 2)Romance and love
3)Lead Female developed tough prickly outer shell in order to succeed in the workplace

Different Concepts
Second Virgin
1)Dark Romance
2)Resonant Storyline

They both have a girl who has this strange power. And the power is connected to dead people. Both are really fun and enjoyable.

Both dramas are set in the prosecution field, with a backstory that made the leads work in the law field. Both gave the same kind of feeling, with the main couple wanting to be together, but also too many things between them. Both have cute moments and intense moments!

Although the plots and settings of the dramas are very different, I would say if you enjoyed one you will most likely love the other too! They are both excellent quality dramas: beautifully written and amazingly acted. Both are very well liked by most people so definitely consider if you are after an emotionally draining but masterpiece drama! :)

both have an unexpected pregnancy between strangers and the surprising aftermath of discovering a new meaning of what family can be.

LNF turns up the angst and WL turns up the laughs.

Both are charming and good for a weekend drama marathon.

both have some nice chemistry between the leads and you really want to root for them to get together in spite of what everyone else thinks.

The little boy is also cute (although much cuter and more adorable in A Thousand Kisses).

Secondary characters are multidimensional and get solid development relevant to the plot(s).

both depict a spirit roaming between the world of spirits and Earth.

Both female leads suffer from social phobia. There are many scenes in Heart to Heart that are very similar to the scenes from Castaway on the Moon (the helmet and umbrella ones), the director probably got inspired by the movie.

both tackle school life and the love triangle between two teachers and a student. Though Biscuit Teacher and Star Candy narrates a more serious and mature tale.

The two awesome main actors face each other in this melodrama with a lot of romance and secrets. Watch to enjoy Ji Sung and Jung Eum ;)

In both dramas gumihos show up. There are hot guys too~ And both dramas are short, so you can devote a little bit of your time to watch this.