Here is the full list of all 100 Hentai Jigsaw Puzzle achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Complete Level-14
Complete Level-13
Complete Level-12
Complete Level-11
Complete Level-10
Complete Level-9
Complete Level-8
Complete Level-7
Complete Level-6
Complete Level-5
Complete Level-4
Complete Level-3
Complete Level-2
Complete Level-1