Thank you, Wavewright and Róisín! As Grade E cat quite correctly pointed out, the person on the right is definitely Tuuri, whereas the other was meant to be Sigrun - but the angle of the little light that is made it pretty hard to make her recognizable. Now it is up to the viewer to interpret who it is, I think.
And Miriam, this picture was inspired by a painting that hung on the wall in my friends house - for a long time I saw only an abstract orange shape on a dark blue background until one day something clicked and it resolved into a portrait of a person, the orange being the highlights on forehead, eyelids, cheek and mouth. So I can well understand that this it not easily recognizable as anything! But as Wavewright said, it is a kiss.