Hell Correspondence is based from the anime Hell Girl. If you have seen the anime, then you know how it works. If not, then Ai will explain to you. However, this is only for roleplay, not the real deal. The medium through which a client contacts Ai Enma has changed over the centuries. Initially clients would write the names of whom they hated on an ema, which later changed to sending a letter to t
he address appearing in a three-column newspaper advertisement only visible to those with enough hatred. Once the internet became available, people could access the Hell Correspondence website, otherwise known as the "Hotline to Hell". Soon after, the site was adapted into a mobile version that could be accessed from cell phones.[5]
Each medium can only be used at midnight by one who harbors a desire for revenge against their object of hatred. Should someone submit the name of someone against whom they bear a grudge or immense hatred, and their request is accepted, Ai Enma will take them to a realm of perpetual twilight where she offers them a straw doll, one of her companions, with a red string wound around its neck and describe to the client the details of their contract; should the client pull the string tied around the doll's neck, she will ferry the target of the revenge straightaway to Hell. However, once the client's life has ended, he or she, too, will go to Hell, and a black crest-shaped mark appears on the client's chest to serve as a permanent reminder of this and their decision to send someone to Hell. However, this mark is no guarantee that the person themselves won't be sent to hell by another client.
