Girl from Heaven-A Jigoku Shoujo Offshoot Story

Sure, Enma Ai's done a pretty good job in serving up karma to the people who summon her via the Jigoku Tsushin. But when more and more people whom deserve more than being sent to hell go there by other people's revenge, a recently purified soul is sent to balance the karmic scale, undo the curses, maybe save the Hell Girl herself.