Here is the full list of all 20 NEKOPARA Vol. 2 achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Petted Milk
Petted Coconut
Petted Cinnamon
Petted Maple
Petted Vanilla
Petted Chocola
Petted Azuki
Bouncy, bouncy~
Petted Shigure
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Welcome to NekoPara!
Clear Chapter 1
Clear Chapter 2
Clear Chapter 3
Clear Chapter 4
Clear Chapter 5
Clear Chapter 6
Clear Chapter 7