Recommendations

though boss & me is a chinese drama, it also has the CEO/big boss with the normal/poor girl theme going on

Both the main leads have been in jail because of their boyfriends, and both have to face the prejudice of society to ex-convicts later on.

Both are classic romances hugely popular in Japan in the late 90's. They are both touching and timeless stories. Despite all obstacles, their love wins out.

If you ship Tang Yan and Luo Jin, you would like this series also!
Violence is the key in this drama...with romance and drama between the two, of course!

Sound of the Desert is the prequel to Cloud Song.
Cloud Song, although has different costumes and actors portraying each character, is written by Tong Hua also. Both series are great, so far.

Very Dark Tokusatsus aimed for a more mature audience.

-Both Kaiju/Enemies in these two kill humans in brutal ways. Both contain graphic violence, and the use of alcohol.
-Mature themes, both are not for children.

-If you like Tokusatsu grim dark, give these two a try. If you still like lighter and softer go watch Sailor Moon or Super Senttai.

Both shows revolve around doctors trying to save victims of disasters.

Similar heart-related plots, in Greatest love the lead has an artificial heart that causes him problems and makes him think he's in love. Whereas Falling for Innocence, the lead needs a heart transplant and also blames the new heart for making him love.

Other than that they are quite different. Falling for Innocence is a more solid plot

Both take place in a school setting. They've also got a mystery that the students are trying to solve on their own but as they dig deeper the mystery is stranger than anyone thought.

Il Mare has issues of time discrepancy too. The romance was nice as well.

Both movies are Thai BL~! This movie is one of my favorite Thai movies and stars Mario and Pchy

They are both about women over 30 who fall in love with younger boys. Doubting that the relationship will work they both try to be attracted to men their own age and so they have to face conflicts and confusion. While Sore wa, Totsuzen, Arashi no you ni is very deep and dark, last cinderella is a mirror of this drama with lighter episodes and a bit of comedy.

Both these dramas have the basic story line of a girl dressing up as a boy to help someone dear to them. In this case the girl is joining a boy band and she struggles with keeping her identity hidden while she's trying to get close to that one special guy. Both dramas are reverse harem ( a lot of boys falling for one girl), and they both bring up the topic of being unsure of your sexuality.

This is a japanese remake of the korean drama "You're beautiful"

Both dramas have a common theme of keeping a marriage going just for appearances. Both funny and have great actors.

They both have similar plots: meeting with a past lover/ crush and years later the female leads looks have deteriorated and meets the lead guy again.
Get Karl was a comical drama just like she was pretty.