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