Here is the full list of all 18 Fair Princess Under Futa Curse achievements.
Loving myself
Fun with the queen
Fun with the nurse
Fun with the tutor
My feet
Understanding poetry
Punishment for not being obedient
Like animals!
Game ended too soon!
Priestess and her lessons
Forbidden kiss with Selena
Finally, underwear!
Fun with the gardener
I've been cursed!
Fun with the maid
Audience with the common folk
Queen's instructions
Take care