Here is the full list of all 30 HentaiNYA achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Naomi Hight
Lucy Hight
Irene Christine Hight
Josephine Hight
Agata Debra Jane Hight
Sakura Hight
Azarni Hight
Hana Hight
Akira Rini Hight
Miwa Rica Hight
Naomi Normal
Lucy Normal
Irene Christine Normal
Josephine Normal
Agata Debra Jane Normal
Sakura Normal
Azarni Normal
Hana Normal
Akira Rini Normal
Miwa Rica Normal
Naomi Easy
Lucy Easy
Irene Christine Easy
Josephine Easy
Agata Debra Jane Easy
Sakura Easy
Azarni Easy
Hana Easy
Akira Rini Easy
Miwa Rica Easy