That was a preview from YFG a couple years ago. The idea was to make a VN that borrowed a lot from Neighbour's Wife. It later swapped from SFM to Blender so all animations and stills that were made in SFM got trashed.Artist?
I posted pretty much every preview that YFG put out on his discord. But I'm assuming said previews got purged by mods because the thread is about Sum and his works.
In one of his previews from like October-November last year YFG said that he was going to finish and put out the VN because he had invested too much time and money to drop it. So let us hope for the eventual release because the last few Blender teasers we're looking pretty good.