Here is the full list of all 32 Nyasha achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Shinju Normal
Tomiko Normal
Michie Normal
Megumi Normal
Keoru Normal
Yoko Normal
Aki Normal
Shinju Easy
Hikeru Easy
Tomiko Easy
Michie Easy
Megumi Easy
Keoru Easy
Yoko Easy
Aki Easy
Hikeru Hight
Tomiko Hight
Nori Hight
Michie Hight
Megumi Hight
Keoru Hight
Yoko Hight
Aki Hight
Arizu Hight
GameOut
Shinju Hight
Hikeru Normal
Nori Normal
Arizu Normal
Nori Easy
Arizu Easy
GameOn