Here is the full list of all 17 The Crimson Flower that Divides: Lunar Coupling achievements.
You have collected all Trophies
You have collected all event Graphics
You have completed all Endings
You have completed all After Story
You have completed all Special Story
You have completed all Novel
You have completed all Voice Drama
You have completed all Event
You have completed all Dictionary
You have read Touya's ending
You have read Suren's ending
You have read Nohl's ending
You have read Naran's ending
You have read Ruzi's ending
You have read Cef's ending
You have read Esta's ending
You have read Jigi's ending