Jigoku Shoujo Recap

At midnight, a hidden website offers revenge to people consumed by hatred. Ai Enma answers their calls and provides a way to send an enemy to Hell, but accepting her bargain condemns the client to the same destination after death.

Victims, wrongdoers, and people caught between the two bring their grievances before her. Each request ends at the same terrible choice: step back from revenge, or bind one's own fate to the person one most wants to destroy.