Here is the full list of all 21 Hentai Girl Clicker achievements.
Complete the 1st Wave
Complete 10 Waves
Complete 25 Waves
Complete 50 Waves
Complete 75 Waves
Complete 100 Waves
Level UP to 3
Level UP to 10
Level UP to 25
Level UP to 50
Make a Girl Happy ;)
Make 1000 Girls Happy ;)
Make 100 Combo
Make 1000 Combo
Make 5000 Combo
Collect 10 desired items
Collect 100 desired items
Collect 1000 desired items
Check out your rewards in the gallery
Complete 150 Waves
Unlock all Rewards