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