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