It seems to be popular in a lot of Japanese writing, actually. The exact words 希望 and 絶望 are very common. Just look at Danganronpa. Anyone know the origins of such a theme, specifically of the specific words and why they have such relevance in Japanese fiction? The words are paired together in a set every single time without fail. Even in today's Shuumatsu no Valkyrie episodes I saw it come up. It was in a Black Clover chapter as well. I'm sure I could come up with dozens if not hundreds of examples given a few hours.