Ryuji, the head of the legendary biker gang "Antoinette", is reincarnated in a different world in a motorcycle accident. As... a villainess!!! Ryuji is involved in the troubles of the house of Elsa, the daughter of the Tsochuarch family, and is about to be executed? An unprecedented Yankee villain princess who deals with a different world with violence, courage, and determination, is born here!!!