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