Here is the full list of all 100 Hentai Mosaique Puzzle achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
FINALLY!!
COMPLETE THE FINAL MICHIKO & KAORI STAGE AND GET HER UNDRESSED
TOO MUCH!! STHAP!
PUZZLE SOLVING OVERLOAD!
COMPLETE THE FINAL NATSUMI STAGE AND GET HER UNDRESSED
PUZZLE SOLVING SPREE!
SOLVED!
THERE YOU GO!
COMPLETE THE FINAL RIKA STAGE AND GET HER UNDRESSED
AND ANOTHER ONE!
ANOTHER ONE!
BLOCKS FITTED SOME PUZZLE PIECES!
COMPLETE THE FINAL MIKO STAGE AND GET HER UNDRESSED
THAT'S A LOT OF PUZZLES
FITTED SOME PUZZLE PIECES!
COMPLETE THE FINAL KYOKO STAGE AND GET HER UNDRESSED
NICELY PACKED TOGETHER!
LOOK HOW AWESOME I AM!
CLICK THE PUZZLE PIECES 1000 TIMES
FITTED SOME PUZZLE PIECES TOGETHER!
GOOD PROGRESS!!!
COMPLETE THE FINAL HAICHI STAGE AND GET HER UNDRESSED
PEEKER!
WELL THAT'S A LOT
CLICK THE PUZZLE PIECES 500 TIMES
COMPLETE THE FINAL AKIKO STAGE AND GET HER UNDRESSED
3 TIMES CHEATED?
...AND THERE IS THE SECOND TIME
THERE IS ALWAYS THE FIRST TIME!
CLICK THE PUZZLE PIECES 100 TIMES
GREAT START!