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