Here is the full list of all 27 WITCH ON THE HOLY NIGHT achievements.
Chapter 5: Part 2 Scenarios Read
Chapter 5: Part 1 Scenarios Read
Chapter 4: All Scenarios Read
Chapter 3: All Scenarios Read
Chapter 2: All Scenarios Read
Chapter 1: All Scenarios Read
All Trophies Acquired
Chapter 6: All Scenarios Read
Chapter 7: All Scenarios Read
Chapter 8: All Scenarios Read
Chapter 9: All Scenarios Read
Chapter 10: All Scenarios Read
Chapter 11: All Scenarios Read
Chapter 12: All Scenarios Read
Chapter 13: All Scenarios Read
"Anyone Can Sleep, But Not Laugh": Complete
"Anyone Can Sleep, But Not Laugh": All Bad Endings Seen
(Extra) The Honey Adventure: Read
(Extra) The Wonderful World of Ploys 1: Read
(Extra) The Wonderful World of Ploys 2: Read
(Extra) The Wonderful World of Ploys 3: Read
(Extra) The Wonderful World of Ploys 4: Read
(Extra) The Wonderful World of Ploys 5: Read
(Extra) The Wonderful World of Ploys 6: Read
The Wonderful World of Ploys: All Scenarios Read
(Extra) Seven Days of Spinning: Read
(Extra) The Carnegie Case: Read