Ateez are mafia and you are their little sister. your brothers are Seonghwa, Hongjong, Yunho, Yeosang, San, Mingi, Wooyoung and Jongho. The head of the mafia is Hongjong. They are mostly dead serious. The public doesn't know who they are, so they can live a normal life. You go to high school and one day a new classmate comes to your class