Here is the full list of all 12 Smiling Girls achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Genevieve Normal
Gaia Normal
Agnia Normal
Hera Easy
Gaia Easy
Agnia Easy
Gaia Hight
Agnia Hight
Genevieve Hight
GameOut
Genevieve Easy
GameOn