Interesting question!!

I don't have a good answer, but here are some ideas.

There are stories that fit your requirement on

https://medium.com/tantalizing-tales

sometimes.

I published some on Heart Affairs (https://medium.com/heart-affairs) but didn't publish there recently, so not sure what's the status.

https://medium.com/@sieranlane and https://debduttapal90.medium.com/ come to mind also. They have some "romance" stories. But don't write only in that genre, far from it.