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