A supernatural system allows people to take revenge by having other people sent to Hell via the services of a mysterious entity and her assistants who implement this system. Revenge, injustice, hatred, and the nature of human emotions are common themes throughout the series.
Genres: Animation , Drama , Mystery , Sci-Fi & Fantasy
Keywords: angst , anime , bullying , comeuppance , curse , dark-fantasy , death , detective , hell , horror , psychological , revenge , school-life , seinen , supernatural , suspense , tragedy , watch-anime-series-online