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