Ramponia, a city made for gangs to fight each other for money and fame. Shiori, being an outsider, missed her stop and is stuck in Ramponia. How will she get out of there?

Many humans... Only one girl left... Akuma, being the last to survive amongst the females, is forced to survive in a twisted world filled with males. Males want to use Akuma as a way to bring the earth back to its original state while she thinks so otherwise. One day, Akuma's gender was exposed and taken away by the Jatcai Family. What will happen to her?

Chiaki swore revenge on her friend who died and kill The Blue Devil.
However, things went south once she starts to fight.