Why does this manga have such a low rating? Is it because of the prickly theme? This looks like one of the best psychological mangas I've read lately, it tells about a serious matter in a serious way: it's crude but poetic at the same time, both the art and the storytelling are amazing. I don't really see anything superficial in this, it's a dark story that balances well with the light-hearted stuff I usually like to read.