Here is the full list of all 32 Nya Nya Nya Girls 2 achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Manami Rica Normal
Miyuki Normal
Ayam Normal
Kazumi Normal
Seyeri Takara Normal
Amaya Asuka Easy
Naomi Easy
Sakura Easy
Miyuki Hight
Kazumi Hight
Ayam Hight
Amaya Asuka Hight
Naomi Hight
Koheku Hight
Sakura Hight
Manami Rica Hight
Seyeri Takara Hight
Amy Hight
Amaya Asuka Normal
Naomi Normal
Koheku Normal
Sakura Normal
Amy Normal
Koheku Easy
Manami Rica Easy
Miyuki Easy
Ayam Easy
Kazumi Easy
GameOut
Seyeri Takara Easy
Amy Easy
GameOn