Here is the full list of all 15 Ero Manager achievements.
Finish Stage 4
Finish Stage 3
Change Clothes
Finish Stage 2
Use item
Finish Stage 1
Enter the game
Finish Stage 5
Finish Stage 6
Finish Stage 7
Finish Stage 8
Finish Stage 9
Finish Stage 10
I need help
Play the game at 1 am.