The five Hokke sisters lost their parents when they were quite young. Although they are poor, they`re living comfortably because they have a dream, which is to be evil. The Hokke Family has belonged to an evil organization and worked as a combatant. When their father died, he left them a message that asked them to become a villain that he couldn`t become. However they wondered how to become the best villains.
One day, the youngest sister Utano found a jar. They were told not to open it until they we`re 18. It was sealed by a talisman labeled R18. Akuma-ko broke the seal on the jar and a devil appeared. The demon said they had special powers inside of them, when they have the weapons in their hands they would turn into Gedo Otome Tai.