This is a story depicting the underworld showdown event known as the Villainess Ranking, where historical villainesses battle each other. The protagonist, Otori Kujiramaru, a man betrayed by a woman who swindled him out of 50 million yen, cannot accept reality, thinking,
"There's no way Rika-chan could be a villainess who tricks men and steals their money..."
As he wallows in his thoughts, a woman who has suddenly appeared in his room speaks to him, saying,
"That girl is no villainess."
The woman's name is Marie Antoinette. Through his encounter with a true villainess, Kujiramaru gets caught up in the battles of the Villainess Ranking.