Those who deceive others to extract money from them are referred to as white swindlers (Shirosagi), while those who scam individuals of the opposite gender are called red swindlers (Akasagi). Black swindlers (Kurosagi) are those who defraud the white and red swindlers. Kurosaki becomes a black swindler after his family is deceived by white swindlers, and he sets out to seek revenge on their behalf.