Achievements:
Complete the following Tasks to earn the listed achievement. To view your achievements and stats in Steam, select "Community", then search for the game hub that corresponds to [An Octave Higher]. Select the "View Stats" drop down option, then choose the option for your username's achievements.
Achievement - How to unlock:
Egregia cum laude - Finished the story.
Happily ever after - Took over the candy house.
So beautiful and lost - Finished the story.
Whatever I know about magic - Finished the story.
Why not? - Finished the story with the true ending.
Your afternoon tea, My Lord. - Finished the story.