Here is the full list of all 94 Hentai Pair achievements.
10/10
I am the best!
9/10
8/10
7/10
6/10
5/10
High Five
I found it!
Level 5
Level 6
Level 7
Level 8
Level 9
Level 10
Level 4
4/10
3/10
Level 3
Level 2
2/10
Easy One
1/10
Level 1