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
Hikeru Normal
Tomiko Normal
Nori Normal
Michie Normal
Megumi Normal
Keoru Normal
Yoko Normal
Aki Normal
Arizu Normal
Shinju Easy
Hikeru Easy
Tomiko Easy
Nori Easy
Michie Easy
Megumi Easy
Keoru Easy
Yoko Easy
Aki Easy
Arizu Easy
GameOut
GameOn
Arizu Hight
Aki Hight
Yoko Hight
Keoru Hight
Megumi Hight
Michie Hight
Nori Hight
Tomiko Hight
Hikeru Hight
Shinju Hight