Here is the full list of all 19 NEKOPARA Vol. 4 achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Clear Chapter 6
Clear Chapter 5
Boing Boing
Clear Chapter 4
Petted Fraise
Clear Chapter 3
Clear Chapter 2
Clear Chapter 1
Petted Shigure
Petted Maple
Petted Coconut
Petted Cinnamon
Petted Azuki
Try playing it in Chinese!
Try playing it in Japanese!
Petted Vanilla
Petted Chocola
Try playing it in English!
Good morning