Any dramas where the leads are teachers at a school and fall for each other? 

I dont saw yet.
But Lion Pride appears to be exactly that. ML is a Math teacher and FL is a History Teacher.

 fanitha:

Gomenne Seishun!

Any romance?

It's more focused on the highschoolers's lives, the romance happens like in the last 2 episodes

They do get married at the end and she likes him first.