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