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