The story begins when you, who don't know anything, suddenly awaken a black shadow that burns like fire that covers your body. At the same time as those of you who accidentally found a card with the joker symbol

On the other hand, Fiveland is an organization that collects cards that can give strength and abilities to the human who has them as well as an exorcist. immediately rushed to your location at the casino after being forced by your adoptive father to go there after you were told that you were Satan's twins

You who just found out about your own origins, are trapped between being hunted by the Fiveland organization or being taken away by other demons to the satanic dimension which is my real father and demon king

But in the midst of this situation, you prefer to join the Fiveland organization when you are on the verge of death. But because the adoptive father who tried to protect you from other demons was killed by the demons, you couldn't help feeling sad and angry.

"What–..." Bachira was about to ask, but was stopped when you fainted after the shadow covering your body slowly disappeared

"We'd better go back..." Suggestion from Hiori who realized that you were being hugged by Bachira because you fainted, in the middle of eradicating the demon who was targeting you just like Sae,Kaiser, Bachira and Hiori who were also on a mission to target you