b-kdramatic

1. This is a ridiculous comment, and manipulative behavior on the part of Garosero.
2. The fate of a democracy, and all of the citizens living in it, should not be tied to an unrelated scandal, no matter how tragic that scandal is.
3. Judges follow the rule of law. In an ideal world, judges should be impervious to public opinion. It is completely inappropriate for members of the public to call them in an attempt to influence their votes. Of course we all know that bias and corruption exist, but I hope the judges make decisions that they, and history, can be proud of.

Beautiful World - parents try to find out why middle school son is in a coma
Familiar Wife - similarities to Go Back Couple
Heard It Through the Grapevine - not married in 1st episode but pretty quickly
Recipe for Farewell - a family comes to terms with wife's serious illness
SKY Castle - ensemble piece with several families and a variety of married relationships, plus the lives of the kids competing for college admissions, and a mystery
Tomorrow with You - Time travel, melodrama, romance
Welcome2Life - Alternate realities, ML is married in second reality; law, detective, romance
When the Phone Rings - mystery, thriller, romance
Yonder - In the future, a man's wife dies and is uploaded to the cloud. He goes looking for her. Sci-Fi, melodrama

Not sure if this is what you're looking for, but these feature marriages with unhappiness, deception or affairs, and sometimes the happy ending is that a couple separates:
Love Affairs in the Afternoon - realistic slice of life
Mine - a marriage is not what it seems, has a bit of a thriller angle
Misty - thriller
On the Way to the Airport - slice of life with a mystery
My Wife is Having An Affair this Week - slice of life
The Good Wife - law, political
The World of the Married - thriller, melodrama
Woman of Dignity - makjang
V.I.P. - Mystery, business, melodrama

It's really interesting to hear that history! I've always been baffled by the difference in tone between the bulk of Misaeng and that last episode/opening scene.

Have you seen Secret Love Affair? ML and FL are classical pianists, and the actors put a lot of work into getting the movements right, and even playing a little. However when we see hands on the keys we are mostly seeing the two professional pianist stand-ins (who also played the OST). Here's an interview with those two pianists, including some live performances in the studio: https://pianoconversations.wordpress.com/tag/interview/

I'm wondering if the "midnight romance" refers to the romantic idea that Lee Jun Ho, Teacher Pyo, and eventually Seo Hye Jin have that students should truly learn material rather than memorize test responses. In episode 12 at 12:54, when Jun Ho and Hye Jin are arguing teaching philosophy in front of Teacher Pyo, he says Jun Ho's position is not irresponsible nonsense but a word that sounds like loman/roman(ce) - one platform translated this as "passion" and another as "an ideal". Unfortunately I don't speak Korean beyond phrases picked up over three years of drama-watching- would love to know if he was really using a loanword derived from the English word romance. If so, this scene would be the source of the drama's English title.

It's a metaphor to signify becoming ("graduating into") an adult; that is, someone who is mature in their relationships and their ambitions or plans. The metaphor echoes and contrasts with the real-life diplomas the characters have or seek - because you can complete a degree but still be immature, unready, or unrealized.

Lee Jun Ho uses the metaphor first, as he admits that he has been a naive idealist, and somewhat self-centered, but the crisis at the hagwon has forced him to grow up. Seo Hye Jin then reflects his words back to him and claims her "shiny diploma" as she steps back onto the path to becoming a lawyer, after realizing she had wandered away from her dream almost without thinking.

The Korean title of the drama translates as "graduation" or "graduate" so clearly this concept is pivotal to the story. Throughout the drama we see the theme of maturing and moving to the next stage in life in both students (Ha Yul, whose life is controlled by adults, learns she is capable of thinking for herself; Si Woo stands up for himself against the fearsome White Witch and learns how to understand texts rather than memorize the answers), and adults (examples include the lead couple of course, but also Sung Gyu who becomes ready to marry, his mother who graduates to leading/co-leading a hagwon at last, Teacher Pyo who risks leaving a secure job at the school for the opportunities at a hagwon, and others.)

He played such a nasty person in Dali and the Cocky Prince that I have a negative reaction when I see him now. I was curious whether it was something about his personality that led to receiving all these villainous roles so a while back I watched him in a clip from a variety show - and he was totally charming and silly. I don't know why he's letting himself become typecast like this.

He was a cheery assistant to CEO male lead in the romcom Lie to Me. That was a long time ago though (2011). In the romcom One More Happy Ending, he was second male lead - supposedly not a bad guy, but the character came off as a little controlling and unpleasant, which was the biggest flaw in an otherwise fun show.

He was the lead in Crazy Love!