Y/n is the new student of the "Gangster High Academy", known as 'School of Gangsters'.There are fighters,some student can kill people but not all. Transfering in the "Gangster High Academy" isn't normal like other schools.You have to pass the examanation,(how to fight,kill and etc.) but seem's like it's just like a peice of dust at Y/n.... And the first day of her school is terrible but she have to endure it for her 'revenge' and all students do not know her true identity that she is the 'Gangster Queen' Y/n hide her true identity as a gansgter because of the accident of the 'Gang War' between her Gang and the Gang group of "HARM DC" only her parents and her siblings know that she's a gangster. Speaking of 'Gangsters' there are famous group known as |BTS| the terror of all gangsters except the gang of 'HARM DC' and that's the reason why Y/n transfer at this school.... But what if she meets the gang of BTS? and the two members of BTS are fall in love with her?! Who will be it?!!!