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 purify pages, make them clean.
Can read and correct texts after translator.
Be a true professional!
Can scan new pages for the team.
Good Ending.
Pesky birds!
Can type texts to the images.
Bad Ending I.
Bad Ending II.
Can find out prerelease shortcomings.