The story of different individuals that have a certain grudge access the Hell Hotline (Jigoku Tsushin) to enter the name of those they want revenge on. Enma Ai, the hell girl, takes on the revenge for them in exchange for eternity in hell after their death. (Source: ANN)

Akaza is singing and playing her guitar on a windy day when her music sheets fly away. Then a man comes up to her and asks her to sing for him?

Sequel to the Shin Jigoku Shoujo manga.