Here is the full list of all 27 Paradise Cleaning achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Finish Tutorial
View Kuko's CG at gallery for the first time
Clear All Kuko's stage
Collect All CGs
Clear Kuko's stage 4
Clear Kuko's stage 3
Clear Kuko's stage 2
Clear Kuko's stage 1
View Relfilym's CG at gallery for the first time
Clear All Relfilym's stage
Clear Relfilym's stage 4
Clear Relfilym's stage 3
Clear Relfilym's stage 2
Clear Relfilym's stage 1
View Ao's CG at gallery for the first time
Clear All Ao's stage
Clear Ao's stage 4
Clear Ao's stage 3
Clear Ao's stage 2
Clear Ao's stage 1
Clear All Arika's stage
View Arika's CG at gallery for the first time
Clear Arika's stage 4
Clear Arika's stage 3
Clear Arika's stage 2
Clear Arika's stage 1
Start the game