Family dramas. They give a similar feeling. Also there is who keeps a secret in order to protect the one they love.

For life-romance-melodrama lovers.
A pitiful man, wounded by life.
FL in a similar situation where she has a bright future in front of her but she is in love with a man that is retarded in the eyes of society, and he loves her earnestly.
Well-written, well-directed, good music, good side characters...
and GREAT acting.

Love in Sadness music vibe is present in Bad Guy (and vice versa).
Melodramas with some suspense.
A fight with those in power. And falling in love during the fight.
Hidden identities. Lies. Pitiful.
Love in sadness is less painful, however.
Bad Guy is way more intense.

Smart and strong-headed FL that only cares about herself and eventually the ML. But really child-like inside.
Calm ML with a painful past and a current priority.
Dramas have very different themes.

A very big family living together.
With many daughters and one son.
One overwhelmingly cute and sweeeeet couple.
The same mother actress, but totally different personalities.
So entertaining and very funny.

The badass feeling.
Badass ost.
Tough, quiet, unique MLs.
Unique dramas with friendship and life values.
Strangely enough, the MLs have the same hairstyle.

Dramas with really similar vibes. The leads are connected by a very similar incident. The music is calm. The scenery is beautiful. Healing dramas. Tear-jerkers. Heart-melting. They give the same feeling.

The similarity in names is just ironic!
Similar feeling. The instant connection, the slow romance, the gazes, and the tension.
Beautiful dramas that focus on the romance, with a similar story.
Similar stories. A wounded man, and a girl in a long committed relationship who's soon to get married. They meet in a similar manner.
Of course OSN has a different quality since it is newer, but Summer Scent has a really good quality given the time it was aired.
Both are slow and quiet dramas.

My princess kept reminding me of pasta while I was watching it. Then I learned that they were done by the same director.
If you want a similar romance drama with the same lovable vibe, and a slowly progressing romance, with good acting cast…
They even have similar music.
Both are very addicting after the first episode.

Both are light politics dramas with some really good laugh-out-loud comedy. They are both fun if you don’t like serious and heavy politics.
All About My Romance is... well ... about romance, and My Fellow Citizens has little only.

Radiant Office is also about the struggles of new people in an office, their bosses, office life, business, etc.
But it is lighter and brighter with a subtle romance. While Misaeng (Incomplete Life) is on the more serious and darker side.

Similar boss/employee relationship with a similar vibrant female lead. And a light-hearted romance.............