Long Lost Mafia Girls

Kiersten, a cold, sarcastic, emotionless, and a mean girl meets 3 girls similar to her. They formed a group named "Black Shadow Gang". She trained them to be undefeated gangsters like her,but before that she have a 4 remaining member in other country. 8 gangster boys who she thought was just acting cool and pretending like they are kings, little did she know that one of them owns Degrassi Academy.