Here is the full list of all 13 Fluffy Store achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Complete Chapter 8
Thank you for playing!
Complete Chapter 7
Complete Chapter 6
Complete Chapter 4
Complete Chapter 5
Complete Chapter 3
Complete Chapter 2
Complete Chapter 1
Welcome to Fluffy Store
Play the game in Japanese
Play the game in Chinese
Play the game in English