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