Black Butlers

Amaya and Scarlet, 2 twin sisters, have a big family. They have twin older brothers and twin younger sisters. Then in one night someone comes in and wipes out their whole family except them. They are kidnapped. Now they are in a prison. One night they pray all night. And their prayers are answered. Two twin demons with silky black hair and blood red eyes appear. They agree to work as their butlers until they kill who killed their father. And in exchange they get to eat the twins soul. Join them as they go through heartbreak and hard decisions to find out who killed their family. But they find out more then they bargained for.