Claudia, the daughter of a duke in the Lumiere Kingdom, is on the verge of the death of her mother, Elizabeth, and learns that this world is a world of otome games, that her mother is reincarnated from another world, and that she will eventually become a villainess and be destroyed. We are informed about the future. In order to avoid her doom flag, she is forbidden to enter the Royal Magic Academy and forced into a political marriage. Claudia steals her "magic card" and uses the power of "devil" to destroy her. I hope to change my own destiny. Claudia is at the mercy of the devil's power, and what appears before her is a yakuza from another world who calls herself Hachi!?