"In this world, they say some things are right and others are wrong. Apparently what they call 'good' is right, and what they call 'evil' wrong. But who's right? By whose standards are 'good' and 'evil' defined in the first place? If the world was made up of only black and white, it'd be easy for everyone to know...
But in reality, the ideas of good and evil are tainted by each individual's desires and interests. Such standards of the world are formed by choices made by individuals. In other words, these ideas are based on the opinions of the masses, where ultimately only the opinions of the majority remain and those of the minority are crushed. But you can't casually say to someone, you are a lost cause...
You just can't...
How does someone have the right to say that? They think they are so 'righteous'...
While they sell others mindlessly... and rip their hearts apart. In my eyes those kind of people are the ones that look like demons. Don't you think so?"
- Guinness
( The Pale Horse )
There’s the original manga of this which is just ‘Blood and Steel’ with a different art style and 70+ chapters if you want to read more.