For decades, the Abashiri family has stood as one of the world's most powerful and feared criminal syndicates. Under the leadership of the terrifying Daemon Abashiri, the clan is preparing to execute their final and greatest heist. During the family's assault on a major bank, Daemon discloses that his youngest child, Kikunosuke Abashiri, is actually the first daughter born to the family in 18 generations—the very reason he wishes to abandon their life of crime. Much to Kikunosuke's dismay, her father has arranged for her to attend the elite Paradise Academy, hoping the institution will mold her into a proper lady. However, upon arrival, she discovers that the school is even more brutal than the criminal life she has just left. How does Kikunosuke plan to survive in a school filled with teachers who are determined to kill their students?