Here is the full list of all 31 Women's Prison achievements.
Read the teaching introduction
Pass the first review
Pass the second review
Pass the third review
Failed a review
Pass the Harem Ending (With Hot Spring)
Pass the final review without any character ending
View 69's second event
Kiss her in 88 event1
Unlock the sex button for the first time
Do not open the mysterious box
Train for the first time
Work for the first time
Study hot springs expansion
Study Casual Dresser
Get the signed photo in random event
Imitating the voice of the warden in random event
Spend 3000 for food in random event
Put 50,000 in the box when review failed
View 88's fifth event
Pass 88 special cloth ending
Fail a review due to 88
Second trigger of 88's desire dissatisfaction
View 00's fifth event
Pass 00 special cloth ending
Fail a review due to 00
Second trigger of 00's desire dissatisfaction
View 69's fifth event
Pass 69 special cloth ending
Fail a review due to 69
Second trigger of 69's desire dissatisfaction