Shot with a Nikon D810 and a Sigma Art 135mm/1.8
f/2.8 1/250s ISO2500

I used a bare YN560III flash as a blacklight, triggered with a YN560TX.

We were at a wheat field and the couple just under a molle (a common tree in my country, Bolivia). We were lucky 'cause we had a bit of rain, which was a perfect complement to the atmosphere, the tinny drops were freezed by the flash light.

Processed in Lightroom with my color preset and some details with Photoshop.