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