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