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.

• Masaya Matsukaze
• Mamiko Noto
• Takayuki Sugo
• Takako Honda
• Kanako Sakai
• Hekiru Shiina
• Nana Mizuki
• Misaki Watada