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