Here is the full list of all 32 Nya Nya Nya Girls achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
GameOn
GameOut
Mommo Easy
Mommo Normal
Mommo Hight
Mizeki Easy
Mizeki Normal
Mizeki Hight
Kitty Easy
Kitty Normal
Kitty Hight
Katsumi Easy
Katsumi Normal
Katsumi Hight
Ayano Easy
Ayano Normal
Ayano Hight
Asami June Isenami Easy
Asami June Isenami Norma
Asami June Isenami Hight
Any Easy
Any Normal
Any Hight
Ameli Easy
Ameli Normal
Ameli Hight
Akemi Easy
Akemi Normal
Akemi Hight
Acane Aoi Easy
Acane Aoi Normal
Acane Aoi Hight