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