Looking for recommendations on Korean Drama about Romance between older adults

Hello!

I can recommend:
City Hall
Ms. Temper & Nam Jung Gi (romance is low key but the drama is very very good)
It's Okay, That's Love
Jealousy Incarnate

I haven't finished those yet, so I won't say I recommend them, but they fit your bill:
The Gentlemen of Wolgyesu Tailor Shop
Second to Last Love

Twenty Again
Cunning Single Lady

Can we love
9 End 2 Outs
Snow Lotus
Let's Eat

The Lover - There are many couples in this. One of the main couple is a bit older 30s/early 40s

Thank you Panda. Is Second to Last love similar to the Japanese one? ( I think there's a JDrama with a similar name)

lol I just read the synopsis for Fermentation family, looks so complicated xD

+1 vote for On the Way to the Airport

and A Thousand Days' Promise 천일의 약속

I loved that one. Heartbreaking, but soooooooooooo good.

Thanks for the additional suggestions!

Twenty again looks good. Witch's Romance I'll check out since I watched He who can't marry and dr Jang in that too :D