Elegant Friends (2020)

A presumably happy couple is shaken as a murder that is connected to the both of them occurs. Both dramas are set around an investigation to find the culprit, as well as the personal struggles of the people involved in, and affected by, the case.

Both dramas revolve around friends and their lives with each other and with their marriages. Especially one couple is very similar to the main couple of The World of the Married. Both females are doctors, both couples have sons, and both couples deal with conflicted feelings, with obsession and deceive, secrets and murder. But also the other couples have their respective drama and betrayals.
If you liked especially the female lead in The World of the Married, you will love Graceful Friends, for she is nearly the exact same person.

The similarty lies un the fact that both dramas center around middle-aged men.
AGD is lighter than GF which has a murder as a pivotal plot point.

Both these dramas are gripping thriller that will keep you on edge.
Makjang, murder, mystery, friendships, a lot of drama and bitterness are to be expected.

Similiar group of friends involved in a crime, past, suspense both have terrible endings but the starts are awesome xD

Though the tone and atmosphere of these drama are different, they both deal with the lives of a group of middle-aged friends.

Lady In Dignity is more about a set of female friends from Gangnam while Graceful Friends is about a set of friends who have known each other since college.

Both these dramas are gripping thriller that will keep you on edge.
Murder, mystery, friendships, a lot of drama and bitterness are to be expected.

Yoshino Michi is 32 years old. She's been married for five years, but hasn't had sex for the last two. It's not as if she doesn't get along with her husband, it's just that the sex part is lacking. It was a bit unexpected, but one night when she when drinking with her colleague, Niina Makoto, she wound up confessing that her marriage had turned sexless. And then, a shocked Niina responded "My marriage is sexless, too," and smiled with a lonely look in his eyes.