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