Here is the full list of all 12 One Manga Day achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Normal Ending.
Can translate some texts from language to language.
Can scan new pages for the team.
Can find out prerelease shortcomings.
Can read and correct texts after translator.
Good Ending.
Be a true professional!
Pesky birds!
Can type texts to the images.
Bad Ending II.
Can purify pages, make them clean.
Bad Ending I.