Married couple where others causes problems for their marriage?

Any where the 2 leads are married, but you have other people trying to get with the female lead? Like maybe she becomes close to someone, but she never cheats on her husband. It's main for the drama of their relationship, but they come out strong in the end.

No infidelity occurs, just misunderstandings that cause problems for the relationship.

You can try Itazura na Kiss 2 but you will need to watch the first one to gain a better understand ing of the plot.  

Go Back Couple

 Stevie70:

I only know one where they were married, got divorced and then got back together again

✔️ Cunning Single Lady 

And "Emergency Couple"

Valid Love

Go Back Couple

18 vs 29

Sweet 18

Birth of a Beauty

Couple or Trouble

Creating Destiny

Cunning Single Lady

Delightful Girl, Choon Hyang

Emergency Couple

Fated to Love You

Full House

Goong

Hapimari: Happy Marriage!?

Hyunhaetan Marriage War

Itazura na Kiss - Love In Tokyo 2

My Love Eun Dong

My Secret Hotel

Nice Witch

On The Way To The Airport

Playful Kiss

Prime Minister and I

That Fool

 I love dramas:

Valid Love

Go Back Couple

18 vs 29

Sweet 18

Birth of a Beauty

Couple or Trouble

Creating Destiny

Cunning Single Lady

Delightful Girl, Choon Hyang

Emergency Couple

Fated to Love You

Full House

Goong

Hapimari: Happy Marriage!?

Hyunhaetan Marriage War

Itazura na Kiss - Love In Tokyo 2

My Love Eun Dong

My Secret Hotel

Nice Witch

On The Way To The Airport

Playful Kiss

Prime Minister and I

That Fool

Thanks, but some of these have infidelity.