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