Here is the full list of all 17 Anime Artist 2: Lovely Danya achievements.
Complete (3 stars) level 6
Complete (3 stars) level 11
Complete (3 stars) level 9
Change Danya's hairstyle
Complete (3 stars) level 1
Complete (3 stars) level 2
Complete (3 stars) level 3
Complete (3 stars) level 4
Complete (3 stars) level 5
Complete (3 stars) level 7
Complete (3 stars) level 8
Complete (3 stars) level 10
Complete (3 stars) level 12
Unlock the first secret Picture!
Unlock the second secret Picture!
Unlock the third secret Picture!
Unlock all dresses