While the adults were devouring the country in peace the young girls are now plunging into the Sengoku Period. A domination of fear and terror by the Zenchura, a federation of banchos nationwide, began. With 80% of the nation's middle schools already under its control.

Yet, there was one girl who was determined to crush those wicked ambitions. Her name is Asuka Kuraku.

The last time Saki left school it was to change her school uniform for prison greys, but when the Feds needed someone to infiltrate a ruthless criminal organization operating within an exclusive high school, they knew they needed the baddest bad girl of them all!

Now Saki's back on the streets for the ultimate final exam, armed with a top-secret weapon that only LOOKS like a yo-yo, and a license to use whatever force necessary to achieve her goal. Saki's lovely, lethal and ready to lay it all on the line-because if she fails this test, the next outfit she'll be wearing is a body bag!