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