Umong Pah Muang Nang Yua Sawad.

Sorry for the lack of synopsis, but there were none on the back of the cover and I haven't watched this movie. All I can say is that it looks like a dude is stuck in some kind of time warp where he meets (and have sex with) people from the past. Many good nude scenes though with 2 or 3 different actresses, so if you're into this genre, you won't be disappointed.