I watched this on Amazon Prime under the title EXPOSED NEXT DOOR - PART 2. It's another fluff piece, a documentary designed to sell the Japanese pinku feature The Japanese Wife Next Door starring actress Reiko Yamaguchi. Unsurprisingly it follows straight on from Part 1 (and yon wonder why material with such a short running time was divided into two separate parts) and gives you more of the same.
In essence this is a simple filmed interview with Yamaguchi that takes place in a top producer's office while various clips from the movie in which she appears are interspersed throughout. It's straightforward stuff, of interest to anyone with an interest in the film or its content, but oddly irrelevant if you're not going to watch the actual movie.