Here’s an article about the Soviet photographer with more photographs:
https://www.anothermag.com/art-photography/9377/the-clandestine-soviet-photographer-taking-nude-portraits
This looks massively photoshopped. The head on the person on the right does not look like it belongs at all.
Here are two other sites which include the photograph:
I don’t know what you mean with “does not look like it belongs at all”. Is it just the hairstyle that looks “modern” maybe?