Here is the full list of all 20 Fxxx Me Royally!! Horny Magical Princess achievements.
Midnight Magic - Beam me down
Instructions unclear; teleported directly on top of two hunks.
Gotta fxxx 'em all!
Discover Kaoru's OTHER hobby.
Find an unconventional use for the dojo sign.
Take a total tightwad to the happiest place on earth.
Start Kaoru's route.
Don't forget the pose!
Discover Ryuusei's hidden talent.
Get a marine biology lesson at the aquarium.
Start Ryuusei's route.
Start the 3P route.
Take good care of me, got it, mister?
Protect the magi-people in style.
Shout your love to the heavens.
Say goodbye to magi-crimes! Detective Ryuusei's on the case!
Push Sana's buttons one time too many.
Marry your best friend.
Two guys, one idol group.
Get every ending.