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