A gloomy grey world

Some enjoy the universal themes of „hopelessness and loss“.
„There is a serious and dark tone to the series, with a desperate struggle to it that makes it refreshing,“ said one fan, who added that the fact that it is not entrenched in Japanese culture makes it accessible to those unfamiliar with manga.
Many say the mystery, adventure and the focus on the secrets of the communities in the series have lessons for all students of the human condition.