Here is the full list of all 20 LoveKami -Divinity Stage- achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Open sound screen.
Open the gallery.
Clear Sara's route.
Clear all routes.
View 100% of event scenes.
Clear Kagura's route.
View 80% of event scenes.
Complete first playthrough.
Clear Shuri's route.
View the ending movie.
View 60% of event scenes.
Finish the common route.
View 40% of event scenes.
View the opening movie.
View 20% of event scenes.
Open the config screen.
The first tip displays.
View the first event scene.
View the intro movie.
Begin the game.