For the devil, I think he's not that bad. He was just searching for love that no one can understand, he was just portrayed as evil because of his greed and the way he do things in an evil way. The two brothers are stupid, for me, yeah they're stupid. However, all in all, I like the story and the plot. I like the art and the color. Although I think it was rushed, but it's okay, I think I get most of the author's idea.
Stage of the Dark Souls