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