Sukeban Deka  

Delinquent Detective, スケバン刑事[スケバン・デカ], スケバン刑事

Saki Asamiya was a teenage delinquent who had spent time at a juvenile corrections facility. Despite this, she was given an opportunity to redeem herself by working undercover as a cop. Her mission was to investigate the corruption and mysterious deaths that were happening among her high school classmates. To do so, Saki used only a yo-yo as her weapon. However, in order to uncover the truth about her school, she had to confront the wealthy and powerful Mizuchi sisters who had recently taken over after her expulsion.