Here is the full list of all 12 Pretty Girls Panic! PLUS achievements.
Clear all stages of LEVEL4.
Clear all stages of LEVEL3.
Clear all stages of LEVEL2.
Clear all stages of LEVEL1.
Cleared stage "Hiromi01".
First game play.
Clear Arcade mode LEVEL1.
Clear Arcade mode LEVEL2.
Clear Arcade mode LEVEL3.
Clear Arcade mode LEVEL4.
Set YU friendship level to 7.
Set ASAHI friendship level to 7.