Here is the full list of all 21 Vampires' Melody achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
The rain that never ends
Normal people wouldn't believe it
Complete Prologue: An encounter
Welcome to Vampires' Melody
Complete Chapter 1: Waking up from a Dream
Complete Chapter 2: Survival
Complete Chapter 3: Nowhere to Stay
Complete Chapter 4: The Line between Life and Death
Complete Chapter 5: Decision
Complete Chapter 6: A Beautiful Moment
Complete Chapter 7: If this second lasts...
Complete Chapter 8: New World
Thank you for playing~~
Do Not defy the law
Three shots and six holes
The end of the sea
Lonely exile
Another new world?
The winner in life
Nothing, and everything
Earth and Ether