Recommendations

A stepbrother and stepsister fall in love even though they are not blood related, their love is still forbidden.

both are jtbc dramas, means are of a certain quality. one is about a microorganism ending the world, one is about a big earthquake hitting seoul so they have a similar genre and both are good.

Both works are based on the same real life event that took place in South Korea in 2007 where temporary cashiers at a mart were fired and decided to strike.

The rich guy who has both the looks and wealth, who seems to have it all on the outside but grows up with family issues falls in love with a girl who is the opposite.

Both are written by the same author. They remind me of the excellent American Godfather movies, minus the violence. Both are about control and power and family structures.

A poor girl and rich boy fall in love, she is independent and he a bit arrogant plus his parents do not approve of their relationship.

Both films have epic and amazing battle scenes, with the lords/samurai who unite in order to fight against the evil.

Both main male characters are the superiors to the female characters, and there is a similarity when it comes to their pasts. They were insecure in the past and now they are successful; while the female characters only now start developing and changing for the better.

The main character Lee Shin is similar to Bong Ma Roo in CYHMH. Both drama contains sibling love.

It has a similar vibe.
Both of the main female lead go through being mistreated when they were "ugly" (I don't think they were ugly but you know).
Main lead slowly fall in love with the female lead.

poor girl rich boy
a smilliar story but this one is more focus in the heirs but a smiliar general thing !!!

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!