Haro is the death known as Charon, in Greek mythology, the son of Erebus and Nyx (Night), whose duty it was to ferry over the Rivers Styx and Acheron those souls of the deceased who had received the rites of burial.
Haro was working for Hades god of the underworld but one day Devil took over Hades throne and then became the new lord of the underworld . Hades before he died had fell in love with beautiful Persephone when he saw her picking flowers one day in a meadow and carried her off in his chariot to live with him in the dark Underworld.
Persephone never loved Hades but instead she fell in love with Haro and then Zeus decided to take back Persephone for revenge.
Now Devil has one mission for Haro to bring as many souls he can and kill the Olympian Gods.