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.
Clear Arika's stage 1
Clear Arika's stage 2
Clear Arika's stage 3
Clear Arika's stage 4
Clear All Arika's stage
Clear Relfilym's stage 1
Clear Relfilym's stage 2
Clear Relfilym's stage 3
Clear Relfilym's stage 4
Clear All Relfilym's stage
Clear Kuko's stage 2
Clear Kuko's stage 3
Clear Kuko's stage 4
Clear All Kuko's stage
View Arika's CG at gallery for the first time
View Relfilym's CG at gallery for the first time
View Kuko's CG at gallery for the first time
Finish Tutorial
Collect All CGs
Clear Kuko'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
Start the game